介绍光棍节的庆祝方式的英语作文经典20篇

The year is the annual National Day on October 1， the birthday of our great motherland. Along with ups and downs， its been 70 years of our mothers， this day， this nation will celebrate the festival at the venue.

Early in the morning， we go to school， at school， some students out of bulletin boards and painting; Some do greeting cards， open class meetings with a special theme; Others through diaries， poems and other forms expressed her love for the motherland. National Day holiday， the students have to stay at home with Mom and Dad together， the cruise sites， the great cultural experience. Shop at the door with balloons and colorful flags， red， yellow and green ：： permeated with an atmosphere of jubilation. Everybody inside， in the original discount， launched a series of promotional activities. Street sea， but also rank long car buying service， the fight must wait long periods. Scenic visitors like long， countless men， women and children in which to do that people have been taking advantage of the festive play out. Almost no empty parking places， restaurants， hotels， the revenue will be substantial.

这一年是10月1日的国庆日，是我们伟大祖国的诞辰。伴随着跌宕起伏，我们母亲已经度过了70年，这一天，这个国家将在会场庆祝节日。一大早，我们去学校，在学校，一些学生用公告板和绘画; 有些人做贺卡，有特殊主题的公开课; 其他人通过日记，诗歌和其他形式表达了她对祖国的热爱。国庆长假期间，学生们必须与爸爸妈妈一起待在家里，游轮遗址，极大的文化体验。在门口购买气球和彩旗，红色，黄色和绿色::充满了喜庆的气氛。在原来的折扣中，每个人都开展了一系列的促销活动。街头海，也排名长车购买服务，打架必须等待很长一段时间。风景如画的游客喜欢漫长的，无数的男人，女人和孩子，这些人一直在利用节日的乐趣。几乎没有空车位，餐馆，酒店，收入将是可观的。

BACKGROUND

I was born in a small village of Shan Dong Province on April 4th, 1968. When I was young, my family was very poor, so I had to work to earn money to help my parents after class when I was in the middle school.

In 1986 I was admitted by University of International Business and Economics (or: UIBE) to pursue a bachelor degree in Economics. My major is accounting in Department of International Business Management. The undergraduate education gave me a wide range of vision and taught me how to cooperate with others. I developed several professional interests in Accounting, Finance, and International Trade.

The following eight-year working experience offered me a good chance to give full play to my creativity, intelligence and diligence. In 1990-1993, I worked as an assistant to funding manager in China National Technical Import and Export Corporation. In 1993-present, I was employed by China Kingdom Import and Export Corporation to be the Manger of Financial and Accounting Division.

I do believe that with my hard early life, solid educational background and ample working experience, I would be an excellent student of you MBA program.

MY PERSONAL ACCOMPLISHMENT: After graduating from UIBE, I was employed as the assistant to the funding manager by China National Technical Import and Export Corporation. After reading a lot of related files, and analyzing the overall funding situation of the corporation, I found that the loan policy was not been put into effect. So we have thousands of millions RMB loan with very high interest rate while a large amount of cash in bank with very low interest rate was idle. I reported this to my supervisor, and then we studied and revised the loan policy. This revision saved the corporation approximately RMB thirty millions yuan. In order to raise the funding effectiveness, after one year’s hard work, I developed the internal banking system within the corporation based on the actual funding supply and need of the different divisions and projects. This internal banking system made full use of the corporation’ funding resources, and due to this, I was highly praised by the president of the corporation.

WHY CHOOSE YOUR MBA PROGRAM? After I have worked in business area for eight years, I feel that I need to continue my education by pursuing a Master degree in business administration. I have practiced my professional expertise in accounting, demonstrated my leadership abilities and perfected my communication skills. But I have yet to become an entrepreneur in my own right, and to fully master the art of modern business. I want to be trained more vigorously in scientific methods of analysis and synthesis. There are a lot of opportunities and challenges in China that I do not yet fell fully confident to seize. My business career has so far benefited mostly the companies that I worked for, but a good business education in your university will probably become a new era for me.

Your university is well known for its excellence in China’s business education. I am sure that, with my extensive business experience, I can be a worthy student of yours. I am anxious to benefit from your seasoned guidance and take advantage of your research facilities.

My favorite little animal is a kitten, our family has raised a kitten, it is sent by neighbors. Because now the kitten is dead, so I will often think of it.

The cat looks very beautiful, he has a white hair, claws under the pad can make him walk without a little bit of sound. The most unique is his eyes: one eye is blue, the other is green. Blue eyes like sapphire, green eyes like emerald.

Kitten is very greedy, and sometimes a pound of heavy fish soon "destroy" the. Once, my mother made a bowl of fish soup. Kitten jumped on the table, relish eating up. When I was eating, it was found by me, so I taught him a bitter meal. The kitten hung his head, as if to say: "I no longer dare." I immediately laughed.

Now that kitten is dead, since then, every time I see the kitten, and it should play some. Kitty, where did you go?

As is known, there are 4 seasons in a year. We witness their changing. Spring is always the seson with all the plants and flowers growing. Summer is hot but a happy season to us because we can enjoy the long summer vocation. Autumn is cool and comfortable that we can enjoy doing sports. While winter sometimes makes us vexed because of the coldness. They are all beautiful!

My name is——. There are 4 people in my family. My father is a Chemistryteacher. He teaches chemistry in senior high school. My mother is an English teacher. She teaches English in the university. I have a younger brother, he is a junior high school student and is preparing for the entrance exam.

I like to read English story books in my free time. Sometimes I surf the Internet and download the E- books to read. Reading E- books is fun. In addition, it also enlarges my vocabulary words because of the advanced technology and the vivid animations.

I hope to study both English and computer technology because I am interested in both of the subjects. Maybe one day I could combine both of them and apply to my research in the future.

As it is known to us all ,LuXun is a famous Chinese writer. He is not only a writer, thinker, but also the founder of Chinese Literature . He wrote many classic (经典的)novels and his stories, which are translated many languages, were made into film,such as The True Story of AH Q and The New Years Sacrifice,which deeply showed peoples suffering in the old days.

Because of his achievement to Chinese literature, Chairman Mao spoke highly of him. Besides, some of his works were selected into the text books in high school and university. I think youll gain a lot from reading his works.

My new deskmate is a boy of sixteen. His name is Zhang Gao. He is 1.8 meters tall. His strongly-built body and sun-tanned skin make him look like a sportsman. He has two big dark eyes under a pair of thick eyebows. It seems that they are always smiling at you. Compared with my yellow hair, his hair is black and thick. He speaks a little bit fast but very clearly. However, he likes to gesture from time to time while hes talking. He has a dream of becoming a famous actor one day. I believe his dream will come true because of his handsome face and well-developed figure.

我的新同桌是一个16岁的男孩。他叫张高，身高一米八。结实的身材、晒黑的皮肤使他看起来像运动员。他浓浓的眉毛下有一双又黑又大的眼睛，似乎总是在对人微笑。与我的黄头发相比，他有一头浓密的黑发。他的语速有点快，但相当清楚，只是他说话时爱打手势。他的理想是当一名演员，我想他英俊的长相和匀称的身材定会让他好梦成真。

Autobiography

My name is ________. I am graduate from ________ senior high school and major in ________. There are ________ people in my family. My father works in a computer company. And my mother is a housewife. I am the youngest one in my family.

In my spare time, I like to read novels. I think reading could enlarge my knowledge. As for novels, I could imagine whatever I like such as a well-known scientist or a kung-fu master. In addition to reading, I also like to play PC games. A lot of grownups think playing PC games hinders the students from learning. But I think PC games could motivate me to learn something such as English or Japanese.

My favorite course is English because I think it is interesting to say one thing via different sounds. I wish my English could be improved in the next four years and be able to speak fluent English in the future.

[中学生介绍自己的英语作文

Why, you may wonder, should spiders be our friends? Because they destroy so many insects, and insects include some of the greatest enemies of the human race.Insects would make it impossible for us to live in the world; they would devour all our crops and kill our flocks and herds, if it were not for the protection we get from insect-eating animals.We owe a lot to the birds and beasts who eat insects but all of them put together kill only a fraction of the number destroyed by spiders.Moreover, unlike some of the other insect eaters, spiders never do the least harm to us or our belongings.

Spiders are not insects, as many people think, nor even nearly related to them.One can tell the difference almost at a glance, for a spider always has eight legs and an insect never more than six.

How many spiders are engaged in this work on our behalf? One authority on spiders made a census of the spiders in a grass field in the south of England, and he estimated that there were more than 2,250,000 in one acre; that is something like 6,000,000 spiders of different kinds on a football pitch.Spiders are busy for at least half the year in killing insects.It is impossible to make more than the wildest guess at how many they kill, but they are hungry creatures, not content with only three meals a day.It has been estimated that the weight of all the insects destroyed by spiders in Britain in one year would be greater than the total weight of all the human beings in the country.

你可能会觉得奇怪，蜘蛛怎么会是我们的朋友呢?因为它们能消灭那么多的昆虫，其中包括一些人类的大敌。要不是人类受一些食虫动物的保护，昆虫就会使我们无法在地球上生活下去，昆虫会吞食我们的全部庄稼，杀死我们的成群的牛羊。我们要十分感谢那些吃昆虫的鸟和兽，然而把它们所杀死的昆虫全部加在一起也只相当于蜘蛛所消灭的一小部分。此外，蜘蛛不同于其他食虫动物，它们丝毫不危害我们和我们的财物。

许多人认为蜘蛛是昆虫，但它们不是昆虫，甚至与昆虫毫无关系。人们几乎一眼就能看出二者的差异，因为蜘蛛都是8条腿，而昆虫的腿从不超过6条。

有多少蜘蛛在为我们效力呢?一位研究蜘蛛的权威对英国南部一块草坪上的蜘蛛作了一次调查。他估计每英亩草坪里有225万多只蜘蛛。这就是说，在一个足球场上约有600万只不同种类的蜘蛛。蜘蛛至少有半年忙于吃昆虫。它们一年中消灭了多少昆虫，我们简直无法猜测，它们是吃不饱的动物，不满意一日三餐。据估计，在英国蜘蛛一年里所消灭昆虫的重量超过了这个国家人口的总重量。

Hello,every one!（大家好）My name is **** . （我叫****）

Im a 15 years old girl. （我是一个15岁的女孩）（具体情况自己改）

I live in the beautiful city of Rizhao.（我住在美丽的Rizhao城）（你可以把Rizhao改成自己家乡的城市的名称的拼音）

Im an active ,lovely and clever girl.(我是一个活跃的可爱的聪明的女孩）

In the school , my favourite subject is maths . （在学校，我最喜欢数学）

Perhaps someone thinks its difficult to study well .（也许有些人认为这很难学）

But I like it.（但我喜欢他）

I belive that if you try your best, everything can be done well.（我相信每件事付出努力就会有害结果）

I also like sports very much.（我也很喜欢运动）

Such as,running,volleyball and so on. （像跑步、排球等等）

If you need help ,please come to me .（如果你需要帮助，就来找我）

I hope we can be good friends!（我希望我们能成为好朋友）

Good morning， Dear Professors:

Its my honor to introduce myself. My name is XXX， I am fromXXCountyXXProvince， December XXXX I was born in a poor family， and my parents are farmers， I love and respect them very much. We were delight with my becoming a fresh man in September 1997. Luckily， I was permitted to be a graduate student after 4 years colorful life on campus. I received my Bachelor degree2001 inXX Institute of Science and Technology， then a Master degree2004 inXX University of Science and Technology. For those 7 years my major was Die Design. Before I received my Master degree， I had done the subject of XXXXXXXXXXX. For the past 3 years， I have been inXXXXXXCollege， where I have been and still am a teacher. I teach students Machine Design etc. I have published more than 10 first-author papers.

Thats all， thanks!

Different people have different hobbies. For example,someone likes reading,someone likes swimming and someone likes collecting and so on.

I used to read books and draw pictures because by reading books I could learn many funny things. But now I dont like it. I can only learn from books. I couldnt get knowledge from others. I need a change. Traveling is my favorite hobby now. But I cant go traveling a lot. I can visit many different places of interest by traveling. I can learn a lot about people,places and history. Its very interesting. What is your hobby?Lets share each other！

I have many good friends. They all have their hobbies. Ann studies very hard. So her hobby is book reading. Tony loves labour,and his hobby is gardening. He usually plants flowers and trees in his yard. Judy is a quiet girl. She likes knitting. She always knits some sweaters for her dolls. We have different hobbies,but we are good friends.

I love traveling. I have great fun in traveling.

Good morning/afternoon everyone! It is my honor to be here and I really appreciate you offer me the chance of interview .Now I will introduce myself first .My name is……from Xiangfan in Hubei province. Im an honest, responsible, and warm-hearted person. I can adapt different environments quickly .Second I like this kind of field very much and I take it as my career .Till now I have one year experience in this field. As a 21 years man, Id like to experience more to enrich myself and then it can help me to laid good foundation for my future career .There is no use doing what we love ,we must love we do just like the field. At the same time, I am really proud of myself applying for this job. I hope you can give me a chance and I will try my best to do it better. Finally , I hope your hotel can become the best one among hotel industry。 Thanks for your time.

早上/下午好，各位考官。我很荣幸在这应聘这个职位，并且很感谢该酒店给我提供一个面试的机会。现在，我首先来介绍我自己：我叫……，来自湖北襄樊。我是一个诚实、富有责任感、待人热情的人。我能够在短期内适应各种不同的环境。第二，我非常喜欢饮食这个行业，并且我把它当成我的终身职业。到目前为止，我在饮食行业有一年的经验。作为一个已过21岁的成年人，我想要体验的更深来丰富我的生活，并且在那个时候，饮食工作能帮我未来的职业规划奠定一个好的基础。做我们喜欢做的事情往往没有用，我们必须热爱上我们要做的事情，就好像饮食这个领域一样。同时，我以应聘这份工作而感到自豪，希望贵店能给我一个展示的平台，我将全力以赴将它做到更好。最后，我希望贵店的事业如日中天，做饮食行业的领头人。谢谢您抽出时间来面试。

Every Chinese, who experienced 1980s, will remember forever the day November 6th 1981 when the China National Womens Volleyball Team defeated the Japan National Team (the so-called "Toyo Women Magic") with 3 to 2 at the 3rd World Womens Volleyball Cup in Osaka Japan. Thats the first world title for China Womens Volleyball Team. Everyone was shocked by this news. At that time, China had just been out of the "Cultural Revolution". When the news was broadcasted, people burst into joyful tears.

Their victory was the result of all the former volleyball players effort. In 1965,a famous coach of Japan was invited to China to help train the China National Womens Volleyball Team. Seeing both the players conscientious and spirit and the support from the Chinese people, he exclaimed, "Im sure that the China National Womens Volleyball Team will become strong!"

In 1982, the China National Womens Volleyball Team won the gold medal again at the World Womens Volleyball Championships in Peru under the leadership of Yuan Weimin.

In August 1984, the China National Womens Volleyball Team defeated successively the Japan National Team and the US National Team with 3 to 0, and won the gold medal again at the 23rd Olympic Games, which realized the "Triple Crown" dream at the world matches. The pride head coach of Japan National Team said, "Defeating China National Team is equal to block the Yangtze River. Both are impossible." The American coach said, "I hope our children will play basketball as well as the Chinese girls."

The elder players gradually retired after 1985. Then Lang Ping, the World No.1 Spiker at that time, was named the captain. She and her teammates went to Japan to join in the 4th World Cup, and won the title for the 4th time without losing any match.

Two years later, the China National Womens Volleyball Team came to the 14th World Womens Volleyball Team Championships. Though the famous players, such as the "Iron Girl" Cao Huiying, the "Iron Hammer" Lang Ping, the "Wall of Tian An Men Rostrum" Zhou Xiaolan, and the "Quick Attacker" Zhang Rongfang, had retired, the Chinese girls still won the gold medal by their strength and wisdom. The "Penta Crown" shocked the world. What a miracle!

The "Penta Crown" is not only a great honor, but also an ever spur. It has become the spirit of the China National Womens Volleyball Team. At present, the China National Womens Volleyball Team has become a symbol of striving and competing in Chinese peoples hearts.

As the fast development of other countries volleyball career, the China National Womens Volleyball Team had lost parts of their advantages for a period. In early 1995, Lang Ping, the former core player of the "Penta Crown" team, became the head coach of the Chinese National Team. Though its very hard to train these young players in such a short time, she made it. The China National Womens Volleyball Team won the bronze medals at the 7th World Cups at the end of 1995. Then they won the silver medals at the Atlanta Olympic Games in 1996, and the gold medals at the 13th Asian Games in 1998. The China National Womens Volleyball Team became the No.1 in Asian again. Whats more, they made a greater miracle at the Athens Olympic Games in 2004. These young girls defeated the rival in a very disadvantaged situation and won the gold medals finally, which were the bestaffirmation for their previous hard work.

Along with Reform and Opening up Policys carrying on and the Spirit of the National Womens Volleyball Team, volleyball had spread in all parts of China. You can find people playing volleyball everywhere, not only in the residential areas and the countryside, but also in schools and factories. The Beijing 2008 Olympic Games render a nationwide movement of body-building in China. Meanwhile, it serves more chances for the sports events development including the volleyball in China.

Roman Colosseum 意大利罗马大斗兽场

The Colosseum or Flavian Amphitheater was begun by Vespasian, inaugurated by Titus in 80 A.D. and completed by Domitian. Located on marshy land between the Esquiline and Caelian Hills, it was the first permanent amphitheater to be built in Rome. Its monumental size and grandeur as well as its practical and efficient organization for producing spectacles and controlling the large crowds make it one of the great architectural monuments achieved by the ancient Romans.

The amphitheater is a vast ellipse with tiers of seating for 50,000 spectators around a central elliptical arena. Below the wooden arena floor, there was a complex set of rooms and passageways for wild beasts and other provisions for staging the spectacles. Eighty walls radiate from the arena and support vaults for passageways, stairways and the tiers of seats. At the outer edge circumferential arcades link each level and the stairways between levels.

The three tiers of arcades are faced by three-quarter columns and entablatures, Doric in the first story, Ionic in the second, and Corinthian in the third. Above them is an attic story with Corinthian pilasters and small square window openings in alternate bays. At the top brackets and sockets carry the masts from which the velarium, a canopy for shade, was suspended.

The construction utilized a careful combination of types: concrete for the foundations, travertine for the piers and arcades, tufa infill between piers for the walls of the lower two levels, and brick-faced concrete used for the upper levels and for most of the vaults.

Details

The Colosseum was designed to hold 50,000 spectators, and it had approximately eighty entrances so crowds could arrive and leave easily and quickly.

The plan is a vast ellipse, measuring externally 188 m x 156 m (615 ft x 510 ft), with the base of the building covering about 6 acres. Vaults span between eighty radial walls to support tiers of seating and for passageways and stairs.

The facade of three tiers of arches and an attic story is about 48.5 m (158 ft) tall — roughly equivalent to a 12-15 story building.

[介绍欧洲英语作文

Hello everyone！ My name is * * *, from Jiangsu * *. Very pleased to enter the academic atmosphere of the * * * * college. After all, for every student, public undergraduate is a dream that is worth working through. Today, it is becoming the youth of the post, dream of the stage, the struggle of the blue sky.

For this was rooted in the heart of the dream, we work hard, we fought in the busy high school life, we only know must strive to finish each paper, do well every quality inspection, in each examination room are outstanding. We dont even have time to ask ourselves if its going to be hard work.

Today, I finally arrived at * * * and came to the beautiful campus of the university. Actually, in March of this year, I stepped into this city with a long history for 4 times. However, the legend of the picturesque scenic spots: Dr. Sun Yat-sens Mausoleum, Mochou Lake, the Qinhuai River, Confucius temple, I never want to see. Those famous snacks, I did not want to have a try. I dont want to go shopping in those busy commercial centers in Xinjiekou.

Why? Because I am very clear, I came to * * *, the purpose is to participate in the art of radio and television director of the examination. I remember when I gave myself a chance to choose more, and in the confused eyes of my teachers and classmates, I often played the violin on my back, and took the south train at 4 in the morning.

What kind of day is that? While at the same time to course review, while also practicing the violin concerto butterfly, while reciting the historical geography textbooks, while also have time to read reviews, stories, practice commentary, prepared speech. Even with some basic drawings, I dare not relax. You may know: at Nanjing Arts Institute was next to a park, I took the examination room to see from the south, first, look at the list, and then to go to the provincial exam retest, located south Normal University, I dont know how many times through to a total of 8 times, this park? Or maybe the 10 time? But even today, I dont know what the name of that park is

When the Nanjing Arts Institute professional examination scores down, the provinces fifth results did not bring me joy. I am still in learning, in practice, a tiny bit are not slack. The teacher said, "you have got a good result in the cultural class. Why do you want to do art?" Students say: your violin level already by the China Conservatory of Music grade 8 examination, why practicing until late at night? I dont know how to answer. I just have to try and even try my best. In order to dream, in order to be able to enter the University hall.

Finally, my dream came true. I love art, but I love Chinese language and literature more. Although I gave up art, but art has shed sweat and no waste, because art is able to help us better understand the literature, literature and art combined with each other, a beautiful flower, bear the fruit of happiness.

I sincerely hope that with the help of teachers and students, I can bring my special skills in art field into full play in Chinese language and literature. We can have the opportunity to contribute to our professional development and the development of our school.

Thank you all!

My name is XXX dragons, Mistress (2) class of students, who lives in Funan side of Shuijingfang community.

I am very ordinary, in the whole school more than one thousand students are very inconspicuous. In grade two, my grades are 18 and 11 in the class.

But I also have different experiences with my classmates. I finished my freshman year course when I was four years old. In order to go to school earlier, I left Chengdu to study in Huanggang at the age of five. Back in Chengdu, I was less than six years old when I was in grade two. Maybe its dad who wants me to go to his study place later.

I like to shoot balls, jump rope, run, eat Kentucky Fried Chicken, Beijing roast duck, of course, my favorite is to read. My bookcase is full of Chinese and foreign famous books, and every book is covered with my stamp. Dad says there arent many people in my class who read so many books.

Friday was my lucky day. My English teacher gave me a little certificate of "learning English dolls" and an English book. I put him in a book with Chinese and mathematical rewards and pencils, and treasured them in my desk.

I never buy toys or snacks myself. Want to eat, want to play, want to see and parents say a word, buy or not buy by them to decide. I rarely play games on the computer, too.

My weakness is watching TV and playing games. Ill fix it later.

My mother is very kind and beautiful although she is not tall. She is 42 years old this year. She is a nurse, so she is always very busy day and night. But she loves her job, and she often takes care of her patients.  Of course, she likes singing, dancing, cooking and shopping, but she almost no time to do them. Oh, I love my mother.

Good morning, my dear teachers, my dear professors. I am very glad to be here for your interview. My name is song yonghao, I am 22 years old .I come from luoyang, a very beautiful ancient city. my undergraduate period will be accomplished in changan university in July ,2004;and now, I am trying my best for obtaining a key to tongji university.

Generally speaking, I am a hard working student especially do the thing I am interested in. I will try my best to finish it no matter how difficult it is. when I was sophomore, I found web design very interesting, so I learned it very hard . to weaver a homepage for myself, I stayed with my personal computer for half a month, and I am the first one in my class who own his homepage. Furthermore, I am a person with great perseverance. During the days preparing for the first examination, I insist on running every day, no matter what the weather was like. And just owning to this, I could concentrate on my study and succeeded in the end.

Well, in my spare time, I like basketball, tennis and Chinese chess. Also English is my favorite. I often go to English corner to practice my oral English on every Thursday, and write compositions to improve my witting ability .but I know my English is not good enough, I will continue studying.

Ok, that is all, thank you for your attention.

Please allow me to introduce myself fou you. My name is xx, I am as born in Qinghai Province. Very honored to have this opportunity to come here to interview. Now I will briefly introduce themselves.

I graduated from the Qinghai first vocational schools.

My specialty is computer software applications.

In the past year I have the basic expertise. I like reading books, watching movies, listening to music, and so on. I think I am an honest and optimistic, can also work under great pressure. This is probably, thank you.

good morning !

it is really my honor to have this opportunity for an interview,i hope i can make a good performance today. im confident that i can succeed. now i will introduce myself briefly i am 26 years old,born in shandong province .

i was graduated from qingdao university. my major is electronic.and i got my bachelor degree after my graduation in the year of XX.

i spend most of my time on study,i have passed cet4/6 . and i have acquired basic knowledge of my major during my school time.

in july XX, i began work for a small private company as a technical support engineer in qingdao city.because im capable of more responsibilities, so i decided to change my job.

and in august XX,i left qingdao to beijing and worked for a foreign enterprise as a automation software test engineer.because i want to change my working environment, id like to find a job which is more challenging. morover motorola is a global company, so i feel i can gain the most from working in this kind of company ennvironment. that is the reason why i come here to compete for this position.

i think im a good team player and im a person of great honesty to others. also i am able to work under great pressure.

[求职自我介绍英语