挑战和机会英语作文20篇

宇称守恒定律是物理学界公认的重要原理之一，杨振宁在一次实验中发现得出的结论与宇称守恒定律冲突，便推测该定律可能是错误的。

为了验证“宇称”是否真的守恒，杨振宁和李政道合作，进行大量计算后，发现过去所有相关实验竟然没有任何宇称绝对守恒的根据。为进一步验证，他们倡议学生组建科研小组去做实验。起初没有学生愿意做，因为该定律是公认的，此前从来没有人怀疑过，而且这项实验做起来非常麻烦。不过最终有个女生愿意做，她觉得宇称守恒作为一种基本现象，既然还没有得到实验的有力证明，就应该去验证它。于是她与其他几名科学家合作，在华盛顿做了长达半年的艰苦实验。

1957年1月15日，美国哥伦比亚大学举行发布会，公布了由这个女生组建的科研小组的实验结论——宇称是不守恒的。这推翻了物理学上屹立30年之久的宇称守恒定律，震惊了物理学界。1957年l0月，杨振宁与李政道因此获得诺贝尔物理学奖，参与实验的那个女生也一举成名。她就是美籍华裔物理学家、有“东方居里夫人”之称的吴健雄女士。

1、麻烦可能就是机会。对于实验，多数人的态度是避而远之，而吴健雄却不嫌麻烦，最终为自己赢得成功的机会。为什么机会来临时，我们常常把握不住？因为机会总是乔装成麻烦的样子。麻烦来了，人们的第一反应就是避而远之，这样就错过了机会。

2、大胆质疑，挑战权威。一次实验的结论，让杨振宁作出宇称守恒定律可能是错误的推测，这体现了他不畏权威的精神。吴健雄愿意做麻烦的实验去验证，也是基于不迷信权威的精神。挑战权威是一种坚持真理的.精神，是一种实事求是的态度，更是一种敢于质疑的勇气。

3、实践是检验真理的唯一标准。为验证杨振宁和李政道的观点，吴健雄组建科研小组，以实验检验真理。可见，忠于事实，不盲从，不跟风，以坚定的勇气为船，以科学的态度为帆，才能抵达真理的彼岸！

4、成就自我要耐得住寂寞。他人避而远之的“麻烦”实验，吴健雄坚持了半年之久，经过无数次计算，其间的枯燥、艰苦可想而知。寂寞是黎明前的黑暗，没有寂寞地积累和酝酿，哪有众人瞩目时的光芒四射？

◇打开一切科学的钥匙都毫无异议地是问号。 ——作家巴尔扎克

◇耐得寂寞，才能不寂寞；耐不得寂寞，偏偏寂寞。 ——作家姚雪垠名声的作文素材。

◇因为我对权威的轻蔑，所以命运惩罚我，使我自己竟也成了权威。 ——物理学家爱因斯坦

这几天我非常难过，因为本来我们是要去广州旅游的，就是因为武汉爆发的这个新型冠状病毒，害的我们不能去玩了。

Im very sad these days, because we were going to travel to Guangzhou.

Because of the outbreak of this new coronavirus in Wuhan, we cant play

anymore.

昨天晚上妈妈给我讲了这个新型冠状病毒的`绘本，从里面我知道了这个病毒本来是长在野生动物身上的，但是因为有些人吃野生动物，捕杀野生动物，使这个新型冠状病毒跑到我们人类身上安家落户了。虽然这个病毒很危险，但是人们还是有办法对付它的，尤其是那些医生们很努力地在治疗被感染的病人们，有的病人已经康复出院了。我和外公、外婆、爸爸、妈妈、弟弟都待在家里，不敢出门，如果有人要出去买菜，我一定会提醒他：“别忘了带上口罩!”

Last night, my mother told me about the picture book of the new

coronavirus. I learned from it that the virus was originally grown on wild

animals, but because some people eat wild animals and kill wild animals, the new

coronavirus ran to our human beings and settled down. Although the virus is very

dangerous, there are still ways to deal with it, especially those doctors who

are working hard to treat the infected patients, some of whom have recovered and

left the hospital. I stay at home with my grandfather, grandmother, father,

mother and brother. I dare not go out. If someone wants to go out to buy food, I

will remind him: "dont forget to put on the mask!"

病毒给人类带来了很大的灾难，我想对大家说：“加油!我们有办法对付这个病毒，我们一定会胜利的!”

The virus has brought great disaster to human beings. I want to say to you,

"come on! We have a way to deal with this virus, we will win! "

Today, with the development of Internet, many traditional ways of life have

been changed, especially the way to pay for purchase. The record of credit

occupies important role for everybody, and they need good credit to get loan, so

as to start their business or buy a house. We have come to the age of

credit.

There is a very classic example about the importance of credit. A Chinese

man took the train in Europe. He found no one checked the ticket, so he just

skipped the ticket. He thought he had saved the little money, but when he came

to the bank and wanted to get the loan, he got rejected, because his record of

credit showed he had skipped the ticket, which made him the unreliable man.

The record of credit is the main basis when people asked for loan. The

banks consider the account of money they would borrow according to the credit,

or the departments will check a person’s credit to see if they want to hire him.

The age of credit asks for us to behave ourselves well, or we will live the

tough life.

I think everyone likes weekend. Because it’s time for relax and fun. Now I

want to talk about my weekend.

I often spend Saturday for fun. Such as playing basketball with my friends,

watching movies and TV shows, having a trip with family and so on. And I always

spend Sunday for homework and have some rest. Sometimes I visit my grandparents

with my parents. It’s very interesting to visit them.

Things in the world are changing. People are changing and every creature is

changing. Changing is a neutral word. We can’t judge it is good or bad in

general, because every coin has two sides. But sometimes we need to change,

because it is good for us. Sometimes we will meet some difficult or

uncomfortable situation. When we are not able to change it, we need to change

ourselves. If both of us refuse to budge, the problem would not be solved.

Sometimes we need to change our life attitude; sometimes we need to change our

views of seeing things; sometimes we need to tolerant; sometimes we need to be

strong. Changing ourselves according to the specific situation is good for

us.

I think Mid-Autumn Day is an old traditional festival in China。 Everybody

likes it because its a family get-together。 You see it is called"Mid-Autumn

Day"， so it often es in September or October。 It is on the 15th of the 8th of

the lunar month。 Now， lets say something about this interesting festival。

Firstly， Id like to say something about the moon。 I like it very much

because I want to be an astronaut in the future。 That day the moon is round，

big， just like a beautiful plate hanging on the blue cloth。 When I see the moon，

I will remember the ancient myths——the godess Chang Er and her little rabbit are

playing under the tree which Wu Gang grows。 I will also think about Armstrongs

first moonwalk。 I will also miss the friends in Tai-wan island， in Macao and

Chinese people who are abroad。 I know they are missing us very much， too。

Secondly， I11 say something about the tradition on Mid-Autumn Day。

Look!Theres a big tree in a garden of a Chinese fami-ly。 All the family members

are sitting around a big table under the tree in the open air。 They are eating

the mooncakes and admiring the full moon in the sky。 That is a family reunion

dinner。 The mooncakes and the moon represent the love from a family。 I think

this is one of the most valuable things in the world。

Thirdly，it is a very good opportunity to make three wishes on Mid-Autumn

Day。 My wishes are: the first， I， an astronaut in the future， would like to go

to the moon one day， and stay with the sky and stars; the second， I hope every

person in the world will stay with family， share love from the family forever;

the third， I hope everybodys dream will e true。

That is the Mid-Autumn Day in my mind。 I will always re-member: East or

West， home is best。

I had a very rich winter vacation this year.

At the time of the holiday, my mother was going to work. I was at home in

the daytime. My mother just went home for lunch at noon. Mother said, do things

tight and loose. I hope to finish my homework earlier, so I basically follow the

schedule of school, but I didnt get up early when I got up in the morning. When

I was at school, I had to get up before dawn. In a few days, I finished the

written homework assigned by the teacher, and the rest is to recite Tang poetry

every day, review English and finish the exercises that have not been completed

this semester. In my spare time, I will read extracurricular books. I have read

several extracurricular books during the winter vacation, "childrens literature

in China", "love education", sometimes I will read "readers". Im looking at Niu

Niu by the writer Zhou Guoping.

Close to the end of the year, the busy mother was even more busy. Grandma

knew, and went to our home to help take care of the family, lighten the burden

of mother, grandma came, I have a companion. So my schedule changed. I did

homework in the morning, and I had a new project in the afternoon, that is, let

my grandmother call me knitting yarn. Many people think that knitting wool is a

girls favorite thing to do. I think knitting is fun, so I learn to knit. Mom

said, "knitted sweater is not only fun, but also can exercise our fingers

flexibility very well, which will help greatly in the future, such as typing and

typing, etc. Sometimes, I also contact my classmates, or invite my classmates to

play at home, that is my happiest moment.

The time is so fast that the mommy unit has a holiday. Mom busy in the

work, then busy with things at home. Of course, I have not been idle, I have my

mother went to the market to buy special purchases for the Spring Festival, we

bought a lot of food special purchases for the Spring Festival, poultry meat,

sweets, fruits, beautify Home Furnishing bonsai flowers, festive couplets......

My mother put the flowers and pots well. I drank my father and put it on the

Spring Festival couplets. On the door, and on the walls of the house, a red,

red, big "blessing" was attached to the house. In a moment, the family was

disguised as a year of Chinese taste.

The bell of the new year rounded, we welcomed the year of the tiger, and

people were immersed in a cheerful atmosphere. On the first day of the year, my

mother and I went to relatives, friends and elders. Every time I go, I will

receive the red envelopes from my elders. I think I have received not only a red

bag but a good blessing and a good expectation from my elders. I will study hard

and live up to the expectations of my elders.

Every day, we can see the figures of the volunteers. Actually, they have

formed a kind of scenery of the city. Some people hold that volunteering is

merely a waste of time, because the volunteers have no gains with pains.

However, I believe that doing voluntary is quite rewarding.

In the first place, we can put into practice what we have learnt before,

for instance, when we were asked by a foreigner about the way to some place, we

could practice our oral foreign language, it’s definitely a good opportunity to

express ourselves in a foreign language correctly and clearly.

In the second place, we could make a lot of new friends while we are

volunteering As a proverb says, “At home one relies on one’s parents and outside

on one’s friends”, so it is never a bad thing to have lots of friends.

Finally, helping others is a good way to make you feel happy and when you

help others solve a problem successful, you will feel fulfillment. In this

sense, we reap a bountiful spiritual harvest by doing voluntary work.

On the whole, we can benefit a lot by engaging ourselves in the voluntary

work. Therefore, I suggest those that have abundant spare time registering as

volunteers for the welfare for the public.

I have many dreams, such as I am rich in the future. Therefore, I can buy

all what I want. But my greatest dream is that I want to be an astronaut. Our

country develops fast and our space make great progress in the last several

decades. It has great achievements. All of our country are proud of it.

Therefore, I want to be one of this amazing area. In order to make my dream come

true, I must work hard now. So that I can go to a good university to learn more

knowledge. I hope my dream can come true one day.

In China, there are four seasons in a year, spring, summer, autumn and

winter. Summer is hot and winter is cold. Spring and autumn are comfortable.

Spring lasts from March to May. Summers goes from June to August. From September

to November is autumn. At last is winter, from December to February. Among the

four seasons in a year, I like winter most.

Last night, I went to my friend’s birthday party, I made some friends. We

talked happily, one of my new friends showed us the pictures of the places he

had been visited. We were so envious, all of us had the dream to go travel to

many places, but none of us took the action. He told us that we were so young

and had the energy to see the world. He told us to carry out the plan once we

had the idea. What he told us is right, we are young and it is good to be young.

In the old people’s eyes, we are so free and can go where we want. But most of

the young people haven’t realized the right they have, they waste their youth

and dare not to do what they want.

I think there is no one would say “no” to travel. People love travel, for

it can make them relax and widen their vision. Some people like to travel with

friends, because they want to share the pleasure oftraveling, and they think

the journey will be much easier for they can take care of each other. While some

people like to travel alone, they can go anywhere in anytime. They don’t have to

care about what the partner’s idea. In my opinion, I’m much preferred to travel

with friends, but I always have an urge to travel alone.

Firstly, I was told that travel alone can help people to grow up quickly,

and that’s what I really need. If you travel alone, you have to do everything by

yourself in the journey, for instance, to buy a ticket, to book hotel, and ask

directions. That maybe just a small case for extrovert, but for introvert, like

me, it’s really a big challenge. I remember the first time I go to travel with

friends and my little brother, they did everything, and I just follow and had

fun. I even too shame to check into a hotel, and my little brother did it for

me. I was humiliated for that. So, travel alone could force introvert to do the

things that you don’t dare to do. It could help you to build an outgoing

personality. For extrovert, travel alone could enhance your ability to handle

emergence case.

Secondly, travel alone gives you peace of mind. Image that, you walking

alone in the beach, there are no sounds of human beings, just burst of sound

waves. You close your eyes, enjoy the moment, you will feel peace.

In short, travel alone could be loneliness and dangerous, especially for

girls, but it’s worth having a try for the beautiful scene in the journey, it

seems like all the things are just exist for you.

My favorite fruit

I like banana very much.

Banana always grows in the warm area.

Its nice to eat, and it is good for our healths.

Like us ,monkeys also like to eat bananas.

You can see th is in the zoo.

Im a student.I like eggs and coconut.Because eggs is very good for me .Its very healthy.The coconut is a very sweet .The HauNans coconut is very great.I like them.

【参考译文】

我最喜欢的水果

我喜欢非常香蕉。

香蕉一直生长在温暖的地区。

它很好吃的，并且有利于我们的健康。

和我们一样，猴子也喜欢吃香蕉。

你可以在动物园看到它们。

我是一个学生，我喜欢鸡蛋和椰子。因为鸡蛋对我来说也很好。非常有益健康。椰子非常好吃。华南的椰子很好吃。我喜欢它们。

A little monkey picks up a pumpkin and wants to take it home.But the pumpkin is toobig.The monkey cant take it home.

Suddenly he sees a panda riding a bike towards him. He watches the bike. "l have a good idea. I can roll the pumpkin. It likes a wheel."

So he rolls the pumpkin to his home. When his mother sees the big pumpkin, she is surprised and says, "How can you carry it home?" The little monkey answers proudly, "l cant lift it, but l can roll it." His mother smiles and says, " What a clever boy!"

October 1st is the national day of our country, which is a public holiday

for the whole country. It’s an important day that marks the beginning of PRC. On

that day, there are plenty of celebrations holding throughout the country, from

the central government to the general people. And public places, including big

squares, parks are decorated in festive theme. In recent years, the national

holiday means the golden week as well, which is a short holiday that all people

expect to. With the improvement of living standards, people have more money and

desire to travel and the golden week is a good chance for them. Besides, for

those people who would not go out, it’s a good time to have a good rest as well.

Therefore, the national day means a lot to the Chinese.

The university students opportunity and challenge

If you are university student,I think you have had the more chance to find a better job,but premise you should try to study for yourself when you were stayed in the university.Try to do that.If you are excellent student you will have the more chance to find a better job absolute doubelessly.

When you stayed in your university,you can make more friends,they will help you to do everything in the future,and you can join the make a speech group to practise your spoken English,you also should go to the cooking group to do how to independent.And I think take care of yourself you can do anything.I think a university students will have the more chance and opportunity.They havent got more challenge in their future,if they are hard study students and join more advantageous individual develop group,their future will be better.They are life will brilliant.

Dear mother:

Hello

Dear mother, you have given me life, and my body has run through your

blood. It is your milk, heart, blood, tears and sweat that have become the

greatest liquid of human life and have nurtured me. It is you who feed me from a

hungry child to a primary school student.

Dear mother, there are many kinds of love in the world, but maternal love

is the most selfless, sincere, broadest and most merciful. When praising the

affection of human beings, you are the eternal theme. When you sing the sincere

love of the world, your love is called the first love in the world. Selfless is

your character, dedication is your feelings. You are the embodiment of goodness.

You are a symbol of greatness. Everything beautiful in women is condensed in

your image.

My dear mother, though the hardships of life have made your hands rough,

however, these hands are still so gentle, it always soothes my heart and gives

me infinite comfort; although the heavy work makes your head white hair, but the

body is still like the wing, caring for me all the time. The hard work of hard

work makes your face wrinkle. However, the face is still so kind. It teaches me

the true meaning of life and gives me confidence and strength at all times.

My dear mother, you are the resting place for your daughter. You are the

harbor for your daughter to escape from the wind. With you, our home will be

peaceful and warm. With you, our family will be happy and happy.

Dear mother, your great love is the greatest and selfless, your love in the

heart of the daughter turned from the bottom of the heart from the bottom of the

heart out - only the mother is good, the mother of the child like a treasure,

into the mothers embrace can not enjoy happiness.

Today, I am very happy! Because its the Dragon Boat Festival today! No matter where you go, you can ask for a smell of zongzi. The streets, everywhere to buy dumplings: a small meat meat, meat, egg yolk, meat dumplings, dumplings red dates......

When asked about the fragrance of zongzi, I realized that I was hungry. "Dad! Give me a big meat!" I said. "I want it too, I want it, too!" My sister said. " Dad said, "OK!" Ok! One person, all right. " "Eee!" I said to my sister.

"Well, hmmm! This is delicious, this one is delicious! " I, mom and dad and sister repeatedly praised. Mom said, "now you eat too much, do you want to eat at noon?" I said, "hee - hee, see it at noon." "Its no way to take you!" Linda! Ha ha! " After eating, we went to play badminton.

How happy today it is! I like the Dragon Boat Festival! Oh Yeah!

The Dragon Boat Festival is one of the most popular traditional festivals

celebrated in China, which is on the fifth of the fifth lunar month, also known

as Duanwu Festival. It’s said that it is to commemorate the death of a Chinese

patriotic poet, Qu Yuan, who was snared by corrupt officials in ancient China

and finally committed suicide by drowning himself in the Miluo River to protest

against them.

The traditions and customs held on this festival differ from place to

place, but there are some common in them. First, the most famous and great

tradition is holding Dragon Boat races, which are held by fishermen’s attempt to

protect Qu Yuan’s body against attacking by fishes and other animals in the

river by beating drums and row the dragon shaped boat. Nowadays dragon boat

races have been an annual popular sport activity among people. In addition,

making and eating Zongzi—a dumpling made of glutinous rice and wrapped in bamboo

or reed leaves—is also a popular custom during this day. It can be made by many

kinds of stuffing. What’s more, hanging herbs on the front door, drinking

realgar wine and pasting up picture of Zhongkui—a mythic guardian figure in

ancient china—are also popular during the festival, which are mean to protect

people from evil and disease.

These customs and traditions have been changed a little in recent years,

but they still make contribution to the spread and inheritance of Chinese

culture.

Halloween

Halloween always falls on 31 October. It’s a holiday for children. On that day, children always wear fancy clothes and masks. And then, they go from house to house to say “Trick or Treat”, so that people will treat them with candies. If they don’t receive any candies, they’ll play a trick on people. But sometimes if the people are going out, when the children come, they’ll put the candies in a carved pumpkin lanterns. Children will take the candies themselves. All of the children enjoy this holiday very much.

万圣节总是在10月31日。这是一个属于孩子们的节日。在那天，孩子们总是穿奇装异服而且带上面具。然后，他们会挨家挨户地说“不招待就使坏”，所以人们都会用糖果招待他们。如果他们不接受糖果，他们就会对人们恶作剧。但有时，如果人们外出了，而孩子们来了，他们会把糖果放在雕刻好的南瓜灯笼里。孩子们会自己拿糖果。所有的孩子都很享受这个节日。

Sally is my good friend.She is slim with long black hair.She is a pretty

girl with big eyes and small mouth.She is good at English,so she can speak

English very well.She also likes singing and dancing.Well,she likes doing

sports,and she is good at playing badminton.Her favorite hobby is collecting

stamps,so she has many beautiful stamps from all over the world.She is kind and

funny too,all of us like her.