写一篇关于我的梦想的英语作文经典20篇

Since I was young, I have a special liking to draw, can bring a good painting has always been my dream. On paper the beautiful color is so wonderful! Today, well go to see a look 2015 childrens creative painting series.

Since said originality, so cant simply draw on the paper. The teacher asked us to take some white hats, t-shirts, fan, box and so on to painting. Its not, some people take the paper plates, there are those who take the bottle!

After the excellent performances of the opening and the address of the host, were going to lead! I cant wait to get out the fan and a pen and ready to start painting.

I according to the traditional Chinese painting book, a pen to draw a dash a grown very lush willow. I paint is a landscape painting, because spring is coming, willow sprout, green green, symbol of spring. Classical poetry said good: "jasper makeup into a tree height, ten thousand lop green silk sash." I think that everyone should have a favorable to willow. Several willow tree alongside the somebody else, at the time, or a thatched house. Beside a small river, the river have a clump of reeds and fisherman in driving the boat... When I silence in my painting, on the edge of a classmate has been finished, I look down all eyes, oh, she draw is really good! On the curved crescent sat a little girl, can let a person quiet in the daydream of happiness.

Finished, we will put the pictures on the Internet. Each one beautiful works came into my eyes. Is really colorful!

Results released, though I didnt win, but I realized the joy of painting. With this dream, let us work to achieve your dream, let the dream fly!

我从小就对画画情有独钟，能把画画好一直以来都是我的梦想。在纸上涂出美丽的颜色是多么奇妙啊!今天，我们就一起去2015年少儿创意绘画大赛中看一看吧。

既然说创意，那么就不能单纯在纸上画画了。老师要求我们带一些白色的帽子、体恤衫、扇子、盒子等等来绘画。这不，有人带了纸盘子，还有人带了酒瓶呢!

在精彩的开场表演和主持人的致辞后，我们就要大显身手了!我迫不及待地拿出扇子和笔，准备开始绘画。

我照着国画书，一笔一划地画出了一个长得很茂盛的柳树。我画的是风景画，因为春天来了，柳树发芽了，嫩绿嫩绿的，象征春天。古诗里说的好：“碧玉妆成一树高，万条垂下绿丝绦。”我想，大家应该都对柳树有好感吧。几棵柳树的旁边还有人家，当时，还是茅草屋。旁边还有一条小河，河里有一丛芦苇，还有渔人在驾驶着小船……当我沉寂在我的画中时，边上的一位同学已经画好了，我顺着大家的目光看去，哦，她画得真不错!弯弯的月牙上坐着一个小女孩，能让人沉寂在了幸福的遐想里。

画完了，我们就把画挂在网上。一个个美丽的作品映入了我的眼帘。真是五彩缤纷!

结果公布了，虽然我没有得奖，但我却体会到了绘画的快乐。有了这个梦想，就让我们去努力实现梦想，让梦想飞起来!

in my mind, everyone shall have his own dream. i think that having a dream means that we have an idea, and then we will do all the things to achieve the target. as long as we have a goal to be realized, we won’t be blind at least.

my dream is to become a successful stateman, helping those people who need help with their rights. of course, to be a good stateman is very difficult, but i will do whatever i can do to keep everyone satisfied. thats my dream. i want to try my best to help the poor sick people of our country. china is a developing country which needs good stateman,especially in the countryside and distant villages.

now i’m a junior student on grade one, my dream is also that although at present i’m good at study, i’ll still try my best to be the study winner. now everything i do is close to my dream. i feel life is fill with hope and is colorful, and i have enough confidence to realize my dream.

As a small girl, many teachers have asked me what do I want to be in

thefuture.My answer is always to be a teacher.It is my dream and I study so

hardto realize it.Being a teacher can pass the knowledge to others and guide

themto the right way.Thinking about the great contribution I would make,

everythingis worthy.

haheard from people who said: "great because of drea" some dreamare out of reach, but humanto the moon inot also achieved the dream of one thousand years, enough to prove that the "period".

mdream ito become a musician, clarinet in the school team, from the beginning are ignorant to blow out the right note, eversong from the unfamiliar to the watch can also like flowing smoothly, pleasing to the ear. songlike i dress, dresup for them, and onlthe birth of new life in mhands, and the notefloating in the air, beautiful melodhugged me, from this, i get a great deal of joy.

i waattracted wonderful piano chords, melodiousound, so sign up piano lessons. see someone playing, fingerdancing in black and white keyjump, chord idressed up, foil, song just like the gorgeoupeony, rose, whether happy, sad, lively, passionate; emotions, piano ilike a magic can expresincisiveland vividly, so, i am happto in them, even if the practice coming first to exercise a superpiano art, believe that along athe efforts, will have a dream come true one day.

the essence of the musicianplaa musical instrument, writing songs, all of these can bring people happiness, good mood, and comfort the soul, ithe gift of god give the world the most beautiful, ialso mdrea.

曾听人说：“人因有梦而伟大。”有些梦想虽是遥不可及，但人类登陆月球不也实现了千百年来的梦想，足以证明“事在人为”。

我的梦想是成为一位音乐家，在学校参加竖笛队，从刚开始的完全不懂到能正确吹出音符，每首曲子从生疏到不看谱亦能如行云流水般的顺畅、悦耳。歌曲就像是我为他们穿衣、精心打扮，在我手中才诞生的新生命，而音符飘荡在空中，美妙的旋律拥抱着我，从这当中，我得到莫大的喜悦。

我也被钢琴美妙的和弦、悠扬的琴音吸引，所以报名钢琴课。看到别人弹奏，十指在黑白琴键飞舞跳跃，和弦的装扮、衬托，歌曲就犹如牡丹、玫瑰般的华丽，无论是快乐、哀怨、轻快的、激昂的;各种情绪，钢琴都像变魔法般能表达的淋漓尽致，因此，我乐于投身其中，纵然要练千百首才能锻练出精湛的琴艺，相信只要努力不懈，终有美梦成真的一天。

音乐家奏出乐器的精华、创作的歌曲，这些都能带给人快乐、愉悦的心情和安慰人的心灵，是上天给世人最美丽的礼物，也是我的梦想。

Since I was a little child, I had a dream that I wanted to be a doctor. When I was little, I watched many TV series and movies about doctors. I thought they were so great. Therefore, I made up my mind to be a doctor. In my opinion, doctor is the people who can help patience get out of sickness and pain.I want to be the person who can help others. However, being a doctor needs so much professional knowledge and there is a long way to go. So I have to try my best on my study and go to a good college.

从我还是个小孩开始，我就梦想着成为一名医生。当我还小的时候，我看很多关于医生的电视剧和电影。我认为医生很伟大。因此，我下定决心要成为一名医生。在我看来，医生是可以帮助病人走出疾病和痛苦的人。我想成为可以帮助他人的人。但是，成为医生需要很多的专业知识，还有很长一段路要走。所以我必须努力学习，考上一个好大学。

I am an ordinary person,I have an ordinary dream:Is a doctor.Because doctor may let these experience personally the human which the indisposition suffers to get rid of the pain.May let the human change the health.At the same time,I believed that,will help others,own also to be able to obtain joyfully.Therefore,I hoped future I might be a doctor.

Everyone has their own dreams, like the stars in the sky. Of all kinds, everybodys dream is different, some want to but a doctor, some want to be a soldier, some want to be a scientist... The appropriate an ordinary teacher of my dreams.

Teacher, this noun makes us feel very kind, another mother, just like our teacher told us how to face difficulties in life and overcome the difficulties. However, when we play in the classroom, who also have no thought of what our teacher do. Maybe the teacher corrects our homework in, maybe is serious lessons. Who is worried about the teachers body? I think, probably not! But the teacher still do that. They would rather be a candle, burns himself, lit up the us. They would rather be a street lamp, light up the students future. But they havent a complaint.

I also want to do such a person, only to pay, you planned to. Teach their knowledge every bit of the students, let them on the way of learning progress. I just want to do such a person.

I know that when a teacher is not easy, so I want to study well, cherish every opportunity to learn. I believe that it can become a reality!

每个人都有自己的梦想，像天空中的繁星。各式各样，每个人的梦想都不同，有的想但医生，有的想当军人，有的想当科学家……而我的梦想适当一名平凡的老师。

老师，这个名词让我们感到很亲切，就像我们的另一个母亲，老师在生活中叫我们怎样面对困难，克服困难。然而，当我们在教室里打闹的时候，谁也没有想到过我们的老师在干些什么。也许老师在批改我们的作业，也许正在认真的备课。谁又担心过老师的身体呢?我想，大概没有吧!但老师还是这样做了。他们宁愿做一支蜡烛，燃烧了自己，照亮了我们。他们宁愿做一盏路灯，照亮学生们的前程。可是他们一句怨言都没有。

我也想做这样的人，只有付出，不求回报。把自己的知识一点一滴的教给学生们，让他们在学习的道路上不断进步。我就是想做这样的一个人。

我知道当一名老师不容易，所以我要好好学习，珍惜每一个学习机会。我相信，这一定能变成现实!

My dream home is very big and nice.I have a house and it has at least three floors.On the first floor,there is a big dining room and we can have dinner together.There is also a nice kitchen and a big sitting room.On the second floor,there are all the bedrooms,so all my friends can stay in my house.There are computers,TVs and videos in each bedroom,so everyone can have fun.My own room is on the third floor.I can put the dolls,the posters and other things in it.I also have a balcony and I can see the whole city from it.

What a wonderful home!I hope I can live in it someday.

Everyone has his own ideal, I also have their own ideal, this ideal, like a destination, waiting for you to; This ideal, is a peak, waiting for you to climb.

Since the childhood I had many ideal, or naive or funny, more whimsical unrealistic, but every ideal is I at the beginning, the bottom of my heart the most sincere act, has been accompanied by I walk long or short for a long time. Now think of, also have a beautiful memory. Medicine with its own unique charm to attract me, it has a unique significance: the patient back from the disease, back from death. Ideal became doctors had never wavered in my heart, because I believe it wont leave me, painstakingly pursue it will let me bathed in the sunlight. Whenever see dad open prescriptions, whenever see out of dads clinic in the healing of patients, time always remind me: my ideal is far from me, there will be many obstacles on the road, step on the gas! Through these tough! Toward my ideal!

Ideal is a big dipper in the sky, to trek directions; Ideal is the beacon, light homing shore road! Ideal is fire, lit my ideal male-male fire!

每个人都有自己的理想，我也有自己的理想，这理想，就像是目的地，等待你前往;这理想，就是一座高峰，等待着你去攀登。

从小到大我有过很多理想，或幼稚或搞笑，多是异想天开不切实际的，但每个理想都是我当初，心底最真诚的驿动，都曾伴随我走过或长或短的一段悠悠岁月。如今想起，也不乏一场美丽回忆。医学以它自身的独特的魅力吸引着我，它有独特得意义：把病人从病魔手中抢回来，从死神手中抢回来。成为医生的理想在我心中不曾有过动摇，因为我相信它不会抛弃苦心追求的我，它会让我沐浴在阳光之中。每当看到爸爸开的处方单，每当看到从爸爸的诊所里走出来的全愈的病人，总是时刻的提醒我：我的理想离我还很远，路上会有许多坎坷，加大油门!就能冲过这些坎坷!奔向我的理想!

理想是天空中的北斗星，为迷航者指点方向;理想是灯塔，照亮归航者靠岸的路!理想是火种，点燃我的理想的雄雄大火!

What will our world be like in x yearsI can’t imagine. It must change a lot. If I meet myself who comes from the future, I will ask her whether my dream comes true or not.

My dream is to become an excellent interpreter. When I was in Grade 1, I began to study English. At that time, I was so excited for learning a new language. Because of English, I know that America is a beautiful and polite country. From then on, I hope I can speak English very well and have chance travel to America some day.

Nowadays, English is widely spoken throughout the world. What’s more, plenty of people have realized its importance. In order to make my dream come true, I try my best and work much harder. I start to watch America drama to practice my English. And I also read some English books now. I talk with others to practice my oral English as possible as I can. But the path to the success isn’t smooth. Sometimes I want to give up. But it’s my dream, I can’t give up easily. Shelley said” if winter comes, can spring be far behind”

On the other hand, with the development of China, more and more people are interested in our culture. Some enjoy Beijing Opera, some study Chinese Kongfu, some even learn to speak Chinese, etc. As a Chinese, of course I will help them to know more about Chinese culture. I want to be an envoy of cultural exchange between China and America. So if I am an interpreter, I will introduce China to the world. I believe if I work hard enough, my dream will come true.

Each people all have own dream, so I also have their own dreams. And some of the dreams are hard to reach, some are very simple. My dream is to fulfill their own responsibility, maintained a kind heart and cook, these are my dream dreams.

Actually fulfill their duties and keep a good heart is not so easy to accomplish, it needs to refrain from anywhere at any time, dont temper tantrum, do their duty. In addition as a cook, you have to have a calm heart, because as long as the dry dry floating, how can cook delicious? Alas! Dream is very difficult to achieve! So I want to use any way to achieve your dream? First to fulfill their responsibility must be very respectful to parents, teachers, we also small friends want to have mercy heart, must be kind to everyone, to serious about anything. Namely: "for the respect for the kind; for a person with and; to is true". As for the current clinical chef is to craft a good, dont often dry fast, but well done and so on. As long as do this way, I believe that there must be a may achieve!

Dreams must depend on oneself, others cant help you, also may not have spirit to help you. So all things must oneself to do, by himself. I hope my dream will realize, I more hope you desire can be achieved.

每个人都有自己的梦想，所以我也有自己的梦想。而有些梦想是很难达成的，有些则是非常简单。我的梦想则是努力善尽自己的责任，保持着善良的心和当厨师，这些都是我梦寐以求的梦想。

其实善尽责任和保持良好的心并不是那么简单就可以达成，它需要随时随地克制自己，不乱发脾气，做好自己的本分就好了。另外当厨师，就必须拥有心平气和的心，因为只要浮浮燥燥的，菜怎么能煮得好吃呢?唉! 梦想可是非常难实现的! 那么我要用什么办法才能达成自己的梦想呢?首先对于善尽责任就必须对父母师长非常恭敬，对比我们还小的朋友要有慈悲的心，对任何人必须和气，对任何事情做事要认真。也就是:“对上以敬;对下以慈;对人以和;对是以真”。至于对当厨师就是要手艺好、不常心浮气燥、速度快但做得好等等。只要做到这些方法，我相信，一定有可能会实现!

梦想必须靠自己，别人没办法帮你，也不可能会有精灵来帮你。所以凡事一定要自己做、自己受。我希望我的梦想能实现，我更希望大家的愿望也能实现。

Good afternoon, everyone!

My name is Jia Yangliu. I’m eleven years old. I’m in Class 2, Grade 7.

Different people has different dreams. Someone wants to be a doctor. Someone wants to be a musician，because he is good at music. Someone wants to be a writer， because he likes writing. Someone wants to be a teacher because he likes teaching children.

What do I want to be when I’m older? You see, I like playing the piano. So I want to become a pianist. Playing the piano is very interesting. And you can learn something of music. Piano can make your life beautiful and happy.

I could play the piano when I was ten years old. My teachers and friends say I can play the piano very well.

Now I’m a middle school student. There are many things at school. Sometimes, I have no time to play the piano. But, I’ll still be harder and harder to practice. The youngest pianist, Langlang is my idol. He is such a great pianist. I hope I can be a pianist like him.

I know becoming a piano is a hard job. But I believe I can do it. Where there is a will, there is a way. My dream will come true one day. Believe me! Thank you!

[大学我的梦想英语作文

What are dreams? Is going to make track for to find, with dreams, we have the vast blue sky in the heart, a kind of hard teacher, a contribute to the motherland defenders, a great inventor like Edison, a great writer like old grandpa, etc., is a great dream, and my dream just want to be a fashion designer.

Be a costume designer, to match the color of the clothes, costume design, draw the look of the clothes and so on, do you want to be when I grew up in a special designer, I want to design a four seasons can wear, and can adjust the color of the clothes, the appearance of the telescopic clothes, transform the style of clothes, I also want to design a special woolen sweater, is the standard I do a costume designer.

Ha ha, you must be very surprised, so how novel clothes design, I want to install a temperature adjustment in the dress of the stealth screens, it will automatically adjust according to the temperature of the weather condition, the color will have a multi-function screen, there is a fashion design decorative pattern, and had good several sets of clothing color, the dress and scaling, can shrink into shorts, grow and shrink, still can slip into various styles, such as dust coat, skirt, the dress is comfortable and tide, I want to make a lot of people do put on my own, after numerous changes, thinking about clothes. Special sweater I to design for children, the outside is full of fluffy, white Snow White, goose feather, hat is full of hair, two balls hanging down, very cute! My dream is to be a fashion designer, a special designers, a wonderful dream!!!!!

Dream is to have you to chase that dream, as long as to look for a good dream is to a good future! My dream is so, the design is novel, fashionable clothes, the achievement of the greatest pleasures in my life!

梦想是什么?是要去追去找的，有了梦想就有了心中广阔的蓝天，一个慈祥辛勤的老师，一个为祖国做贡献的保卫者，一个像爱迪生那样伟大的发明家，一个像季羡林爷爷那样的大作家等等，都是一个远大的梦想，而我的梦想只想做一个服装设计师。

做一个服装设计师，要会搭配服装的颜色，设计服装的款式，画出衣服的样子等等，我长大以后要做一个特殊的设计师，我要设计一件四季都能穿，而且能调整衣服的颜色，伸缩衣服的样子，变换款式的衣服，我还要设计一件特别的羊毛衫，就是我做一个服装设计师的标准。

哈哈，你一定很惊讶，那么新颖的衣服怎么设计啊，我想在这件衣服里安装一个调整温度的隐形屏幕，它会自动根据天气的温度情况来调整，色彩会有一个多功能屏，里面有时尚的图案花纹，还有原本配好的几套衣服的颜色，这件衣服还有伸缩功能，能缩成短装，又能缩成长装，还能伸缩成各种款式，有风衣、裙子等，这件衣服既舒适又潮流，我想让许多人穿上我亲手做的，经过无数修改、思考的衣服。特别的羊毛衫我要设计给小朋友们穿，外面全是毛绒绒的，雪白雪白的，都是鹅毛，帽子上全是毛，垂下两个绒球，可爱极了!我的梦想就是当一个服装设计师，一个特殊的设计师，一个美好的梦想!

梦想是要有你来追的，梦想只要去寻找，一个好的梦想就是一个好的未来!我的梦想就是如此，设计新颖、时髦的衣服，成就我一生中最大的乐趣!

It’s hard to make friends if you stay alone all the time. It’s easier to make friends when you have similar interests.

Don’r be afraid to show people what you are really good at. Talk about the things you like and do best.

Look at people in the eyes when you talk to them.

Be a good listner. Let people talk about themselves before talking about yourself.

Be friendly to a lot of people. Try to help your friends when they are in trouble because a friend in need is a friend indeed. That way you’ll have a bigger group to choose from and have more chances to make friends.

I have a wonderful dream in my heart。 Its to speak English very well。 Since English is everything for me。 English is my best friend。 English is my soul。 English is my power。 Without English， Im nothing at all。 Nothing。 Now， I can think in English， speak in English， and write in English。 Some people think Im an Indian。 Some people regard Im a Pakistan。 And some people even consider that Im an Egyptian。 But if I could speak English as good as an American， my future would be brilliant。 So I work very hard。

在我心中有一个美丽的梦想。那就是说一口流利的英语。因为对我来说英语就是我的一切。英语是我最好的朋友。英语是我的灵魂。英语给予我力量。没有英语，我什么都没有。什么都没有。此刻，我能够用英语的方式思考，用英语说话，用英语书写。有些人以为我是印第安人。有些人以为我是巴基斯坦人。有些人甚至认为我是埃及人。但如果我能说英语能像美国人说的那么好，我的未来会很完美。所以我很努力学习。

I have a dream, that is, when a women, since the childhood I have seen many TV series about a soldier, let me by a lot of inspiration, let more determined at the same time, grow up to be a women, in fact, a soldier is not difficult, the key is to see if you can be a good soldier, to protect our country, it is the duty of each and every one of us Chinese people, I think if you want to work for the country, should start from around things, in fact, if you are careful observation will find we have a lot of studying to do in life

As a soldier, very few people are willing to go, but I am different with others, I think a soldier time good things, while a soldier some bitter, but can really exercise yourself, have a responsibility to the country, the classmates all say a soldier is bad, but every time I see people who take long, envy to them, they wear uniforms look very handsome, not because I want to go to the army only pretending, because want to do more service for the people, the people need me, I can arrive in time, the people have a difficult time, to be able to support them, let them feel the army concern to them, let them feel the warmth of the society.

Into an own strength to the nation, for the people, seeking truth from facts, do the real benefit of the people, is the responsibility of soldiering.

我有一个梦想，就是当一名女兵，从小我就看过很多有关当兵的电视剧，让我受道了许多启发，同时让更下定了决心，长大后当一名女兵，其实，当兵并不难，关键是看你能不能当一个好兵，保护自己的国家，是我们每一个中国人的义务，我觉得要想为国家做事，就应该从身边的小事做起，其实你如果仔细的观察就会发现生活中有很多学要我们做的事情‘

当兵，很少有人愿意去，可我却和别人有所不同，我认为当兵时间很好的事，虽然当兵苦一些，但是能真正的锻炼一下自己，能对国家尽一份自己的责任，同学们都说当兵不好，可我每次一看到那些拿着长枪的人，就对他们羡慕不已，他们穿的军装的样子很帅，我想去当兵不是因为只装装样子，是因为想为人民多做一些服务，在人民需要我的时候，我能够及时赶到，在人民有困难的时候，能够支援他们，让他们感受到子弟兵对他们的关心，让他们感受到这个社会的温暖。

为国家进一份自己的力量，为百姓办事，实事求是，做到真正的为民造福，是当兵人的职责。

Hello!Boys and girls.I am a boy,Iam study in a middle school,I am a monitor，I think Im a good student!I have many dreams,like teacher,doctor，scientists.But I want to be an engineer now.Because my father is an engineer,I think he is very tired but happy,too!And have some mony!Ha ha!This jock.As for study,I want to study English better!I think my English is not very well.English make me sad...So my parents spend lots of money to improve my English.I think my parents give me a lot of expectations.If my grades dont well,That would be sorry to them.So I must study better!I think I‘ll study progress!Please believe me!

thanks!

大家好。我是一个男孩,我在一所中学学习,我是一个班长,我认为我是一个好学生!我有很多梦想,像老师,医生,科学家。但是现在我想成为一名工程师。因为我的父亲是一名工程师,我认为他很很累,但是很开心,!并且有许多的!哈哈!这个运动员。至于学习,我想更好的学习英语!我想我的英语不是很好。英语让我伤心…所以我的父母花很多钱来提高我的英语。我想我的父母给我很多的期望。如果我的成绩并不好,他们会难过。所以我必须学习更好!我想我会学习进步!请相信我!

谢谢!

I have a dream about my career.I want to be a teacher, because I

thinkteacher is a good job.Generally speaking, teachers have much

knowledge.Theycan help students to enrich their knowledge.Besides, teachers can

communicatewith students all the time.It helps teachers keep young at

heart.Finally,teachers have two long holidays a year.In the free time, I can do

many things Ilike.And I have time to travel.It makes me exciting.I must work

hard torealize my dream.

Yesterday,we had a discussion.The topic is.What is my dream?Every one has his dream.Some want to be teachers,others want to be scientists.My dream is to become a doctor.

My friends asked me why.I told them my story.When I was a small boy I was very weak.Once I was terribly iii.I had a high fever.My parents sent me to the hospital but the doctors could do nothing for me.Then my parents heard there was a very good doctor in another town.They took me there.I was saved.

A good doctor can save people s lives.From then on I decided to become a doctor.I know it is not easy to be a doctor.But I am determined to study hard.I am sure my dream will come true.

As we all knoweverybody had his/her own dream.

Some dreamed to be a scientistothers had the dream becoming a star or even a president. HoweverI was dreaming to be a teacher when I was a little young boy. As far as I knewteachers were respected by people and they also had a high state of society as well as a farewell salary. Teachers were an honored career although they were hard working.

All in all I dreamed to be a teacher no matter what problem I met and how difficult the situation was.

We all have dreams in our life,fighting with our passion so badly.We are so busy doing our work or our study just like an top ,spin and spin ,and never stop.But after fighting so many years,we might still be where we have been or win and fail.I do not think that this result in the end matters.The most important part is the process of trying and fighting.But what we can do or what we need to do more or less is that we shall never regret what we have done,and then we have no choice but follow what is at next.We may have some failure and lots of weaking points which may stop us getting to the success,which we do not notice.It is this kind of difficult that make us have the target to fight for.But in the end,we overcome our difficulties and made it.I think the most important part which is worth of memorizing is the process of our fighting for our dreams no matter what the result is.What we need to do is just to try our best to make it and value these memories of fighting for our dreams together.

[争取我们的梦想与激情英语作文