my best friend三年级英语作文(汇集20篇)

Thanksgiving Day Tradition-Thanksgiving Day is a communal celebration marked as a sense of gratitude people feel for all the good things in life. This is done by offering prayers, gifting your near and dear ones. The fourth Thursday in the month of November is marked for the yearly celebration. The tradition of Thanksgiving continues till date in the form of

Family Reunion and Feasting

Family feast is an important tradition during Thanksgiving. The entire family sits at the table during dinner and offer prayer to the Lord Almighty for his continuous grace. It is also a time for relatives living in different places to come together and celebrate.

Tradition of Turkey

The traditional stuffed turkey adorns every dinner table during the feast. Pumpkin pie, Cranberry sauce, Corns are some of the dishes cooked everywhere to mark the day. Though historians don’t have an evidence to prove that turkey was eaten during the first Thanksgiving dinner, but the thanksgiving celebration will be incomplete without it.

Parades

The traditional Thanksgiving parade probably started with President Lincoln proclaiming it an official day. The full- dress parade is a way to display the country’s military strength and discipline. The main aim of such parades is to lift the spirits of the spectators, provide them with wholesome entertainment. In the present day, parades are accompanied with musical shows and celebrities.

Football Games

Watching NFL football during Thanksgiving is a popular tradition. The traditional game between the Detroit Lions and the Green Bay Packers continues. One of the most memorable games having been played.

Thanksgiving Day is the USA and Canadas holiday. Later, people often thank the others on this day.

It’s in November of last Thursday is Thanksgiving Day.

Thanksgiving Food

Cornbread, English Cheese Pie, Venison, Ducks and Geese, Wild Turkey, Garlic and Onions, Pumpkin Pudding are Thanksgiving Day’s food.

Thanksgiving Day a very traditional color of the food. Every Thanksgiving Day, Americans must eat a fat chicken. Because turkey is the traditional course.

Thanksgiving Day Blessings

Thank the parents. They give me the life, let me to study.

Thank the sisters and brothers. They let me healthy growth. In my difficult times, they stretched out their hands warm.

Thank the teachers. You let me to study, let me have the ability to pay for someone else.

Thank the friends. You bring me a lot of funny, bring me a lot of self-confidence. You bring me a lot of help, let me better to face all, too.

Oh, THANK YOU EVERYONE!

I am Cendy. I am in Nanhai Experimental Primary School. I am in Class 9, Grade 3. I am tall and thin. I live in Dali. I have many good friends. I often play with them.

I have many hobbies, riding a bike, drawing pictures and reading books. But I like to read books the best. Because of reading books is good for my study. I also like riding bikes. Because of it does a lot of good to my body.

What’s your hobby? Can you tell me?

大家好，我是乌兰浩特市兴安二小三年二班的***。

Everybody is good, I was in Xingan for two years in Ulanhot City three class two * * *.

我长着胖胖的小脸，黑黑的头发，大大的耳朵，一双乌黑发亮的眼睛，扁扁的鼻子，还有一张不太爱说话的嘴。

I have a fat little face, black hair, big ears, a pair of black eyes, flat nose, and a mouth speaking is not love.

我的喜欢游泳、滑滑板、踢足球。我最大的爱好是骑自行车。每到周六，我都要骑着自行车围着大楼转几圈，一会儿快一会儿慢。快的时候，象飞一样，那种感觉很刺激。

I like swimming, skating, playing football. My favorite sport is cycling. Every Saturday, I have to ride a bike around the building a few turns, while the fast slow for a while. When the fast, like a fly, that kind of feeling is very exciting.

这就是我，一个非常普通的小学生。对了，我还没向大家介绍我的优点和缺点呢!

This is me, an ordinary primary school. Yes, I have to introduce our advantages and disadvantages!

我的优点是爱帮助他人做事儿，诚实，心地善良，拾金不昧。我的缺点是写字慢，字写得不好看，有时候一边玩一边写作业，学习又不好，上课也不注意听讲。

I love the advantages of helping others to do the thing, honest, kind-hearted, returning lost money. Slow writing is my weakness, do not look good, sometimes while playing with the homework, learning is not good, do not pay attention in class attendance.

我一定要保持自己的优点，改掉自己的缺点，做一个更加优秀的小学生。

I must keep their own advantages, get rid of the shortcomings of their own, do a more excellent primary and secondary school students.

Late one afternoon, I was on my way home from school. I walked slowly along the street with my head drooped. The scenes on both sides of the street were beautiful, but I had no interest in them at all. I walked and walked, thinking of what had happened that day.

Just a few minutes before the second class began that afternoon, I was asked to go to the teachers office. I heard my teacher talking to my mother with anger.

How could you dare to go to see a film this morning without permission? Mother said at the top of her voice, slapping me in the face heavily. I look at Mother, dumbfounded…

I walked more slowly, for I had seen my house ahead, where Mother was always standing at the door, smiling at me, at this time every day. But now, she wasnt there. My heard was beating faster. I even didnt dare to open the door for fear that Mother should beat again.

Not knowing what to do, I sat on the ground near the door, blaming myself for what I had done. I was lost in deep agony.

Suddenly a soft hand patted me on the head. I looked up, seeing Mother standing beside me. I couldnt help crying, Mum! tears rolling down my cheeks.

Working is important.We work to support our family and to promote ourselves.Therefore in order to prove his ability, someone work with all his might.

工作很重要。我们工作是为了养家糊口，也是为了自我发展。有的人为了更好地证明自己，就拼命地工作。

But the result might be that he probably lost many precious things,such as health and his family.So working is not everything of ones life.Besides working, we should enjoy life more and pay attention to our health.

到头来却有可能失去很多东西，比如健康、家庭。因此工作绝不是生命的全部。除了工作，我们还要学会享受生活，珍视身体。

Now in the era of rapid development, drive a car at work, waste water and electricity, such as timber has been used to it. And is this a series of moves, people are destroying the scar to the earth, environmental protection has been forgotten by the people.

I saw advertised in the country for a year only food waste is equivalent to pour out the ration of two hundred million people a year, this is an astounding number, thus we can see the waste is huge. Moreover, Chinas waste is not a little, we do not pay attention to the automobile exhaust, the harm of battery is buried in the soil... Thus China has become a "waste of power.

How can I be eco-friendly? This is a simple and complex problems. I think "starts from the minor matter" is the answer to this question, never throw rubbish casually, from shopping after all bring their own shopping bag, start from go out by bus more, since to use less disposable chopsticks, lunch box... Environmental protection needs to be done? Eat less animals, with environmental protection batteries, use less air conditioning, water reuse, conveniently turn off the faucet, will waste paper recycling and so on many ways, as long as it contributes to the environmental protection way, is environmentally friendly.

Environmental how many, how much your moral, environmental protection, how much you love how many, how many green, you how many character. From now on will do a green, understand environmental protection, people to protect the environment! Make the earth a better place, let the life become more beautiful, make people more beautiful!

Let the green, everywhere!

在时代飞速发展的现在，上班时开汽车，浪费水电、木材等已经习以为常了。而就是人们的这一系列举动，正在摧毁着伤痕累累的地球，环保已被人们遗忘在脑后。

我在广告上看见全国一年仅餐饮浪费就相当于倒掉了两亿人一年的口粮，这是一个惊人的数字，由此可以看出我们的浪费是巨大的。而且，中国的浪费不是一点点，我们从不注意汽车排放的尾气、电池埋在土里的危害……由此中国成了一个“浪费大国”。

怎么才能做到环保?这是一个有简单又复杂的问题。我觉得“从小事做起”才是这道题的答案，从不把垃圾随便一扔做起，从以后购物都自带购物袋做起，从出门多乘公交车做起，从少用一次性筷子、餐盒起……环保需要做什么?少吃动物、用环保电池、少用空调、把水重复使用、随手关水龙头，将废纸再次利用等许许多多的方式，只要对环境保护有贡献的方式，都算是环保。

环保有多少，你的道德就有多少，环保有多少，你的爱心就有多少，环保有多少，你的人品就有多少。从现在起做一个会环保，懂环保，做环保的人吧!让地球变得更美好，让生活变得更美好，让人们变得更美好!

让环保，无处不在!

First, I want to tell you something about my bestFriendand me. I have a

friend called Dick. In some ways, we are the same. Both Dick and I are good at

sports. We always go to library together to read because of the same hobby. So,

we also study well all subjects. Reading books is important in our life .In some

ways, we are different. Dick is a little taller and a lot stronger than me. I

think it is because he does excise every day. For me, I just take excise three

times a week. Dick likes going to concert, but I have no interest in it. In my

free time, I always watch TV. That is really fun.

升入三年级，我们新开设了一门课程是英语。

第一次上课时的情景让我记忆犹新。课前，我和我的同学们一起讨论“英语课学什么内容呢？”话音刚落，铃声就响了。我们迅速座好等待英语老师的到来，老师一进门，我就觉得教室里的气氛和往常不同，静得连一根针掉下去的声音都听得见。是因为第一次上英语课吗？

我们的英语老师有一头乌黑亮丽的头发，眼睛大大的，个子不高也不矮，但是整个人却很有精神。她教我们学的第一个词是“ms 刘”，有很多同学都不知道什么意思，老师马上翻译过来跟我们说“这个词的意思是刘女士或是刘老师”。随后英语老师就开始讲述第一节英语课。

她先给我们讲了讲英语单词，但是我听的一头雾水，整节课也是云里雾里的，什么都没听懂。放学后我带着英语课本来到校门口等待妈妈来接我回家，妈妈来到校门口笑着说：“你怎么带着英语课本啊？”“我没有听懂老师讲的英语。”刚说完我的眼泪就在眼眶里打转。

回到家妈妈给我打开录音让我跟着读，可还是没有听懂。然后就着急得趴在桌子上哭了起来。妈妈跟我说：“别着急，等你哥哥放学回来教教你。”话音刚落哥哥便打开门大叫一声：“我回来了！”把我逗得笑了起来。哥哥看我脸上还挂着泪珠，便问我怎么回事，我跟哥哥说了原因之后哥哥跟我说：“没事，走，我教你去！”然后我就跟着哥哥来到我的房间开始教我英语。

哥哥一边开着玩笑一边鼓励并教我学习英语，这让我觉得英语没有那么枯燥无味，使我对它充满了兴趣。经过哥哥的耐心指导让我学会了老师之前所讲的那些内容并且预习了后面一个单元，这使我觉的英语并没有想象中的那么难。

哥哥对我的鼓励，让我信心倍增，从那时起我就更努力地，上课专心的听讲，课后细心的做练习、听录音，所以现在的英语还挺不错的呢。

Mother has a pair of big eyes, flexible my eyes a button nose and a big mouth, and a pair of big ear of a good listener. My mothers height is 1 m 55, weighing 110 pounds. She said nothing at ordinary times, but she got angry, will break into a furious rage.

Remember once, I play computer at home, my mother in the kitchen cooking dinner. I play is excited, mother suddenly call I pot of water to burn. I dont want to go, he said: "mother, Ill burn water, now I am playing computer!"

Mother said: "Chen, hurry up go to boil water!" "No!" I said. Mother heard, then forget it. I thought my mother wont call me again, but I played it didnt take long, heard the mother shouted:

"Chen, you go to a pot of water. Otherwise I will take the computer line to pull out! Hear!"

My hunch is that mother is angry, and also very angry! So, I immediately went to boil water. After burn well water, mother has not angry, also let me play for a while computer again!

Mom is my eyes, little by little brought me big. You said, I see mother?

我眼中妈妈有一对灵活的大眼睛，一个翘翘的鼻子，一个大嘴巴，还有一对善于倾听的大耳朵。我妈妈的身高有1米55，体重有110斤。她平时没有说什么，可是她一生气的时候，就会大发雷霆。

记得有一次，我在家里玩电脑，妈妈在厨房做晚饭。我玩得正高兴呢，妈妈忽然叫我装壶水来烧。我不想去，就说：“妈妈，我等一下再烧水吧，我现在正在玩电脑呢!”

妈妈说：“陈瑜，赶快去烧水!”“不去!”我说。妈妈听到后，便不说了。我以为妈妈不会再叫我了，可是，我玩了没多久，又听见了妈妈的叫喊声：

“陈瑜，你赶紧去一壶水!要不然我就把电脑的线给拔了!听到没有!”

我有预感，妈妈已经生气了，而且还很生气!所以，我立刻去烧水了。烧好了水后，妈妈终于不生气了，还让我再玩了一会儿电脑呢!

我眼中妈妈就是这样，一点一点的把我带大的。你们说，我眼中妈妈好吗?

My English teacher is a young lady. Her name is Kate. She looks beautiful.

我的英语老师是一位年轻的女士。她的名字叫凯特，看上去很漂亮。

Her English is very good. She teaches us many things, and she likes to introduce foreign countries to us. She works very hard, because she likes teaching.

她的英语很好，教了我们很多东西，而且她喜欢向我们介绍外国的国家。她工作很努力，因为她喜欢教书。

I like her spoken English. She has good pronunciation and writing. All of my classmates like her.

我很喜欢她的口语，她的发音和书写都很好。所有的同学都喜欢她。

Hello,My name is Amy.Im 9 years old.I am a student in Yu Cai school.I am tall and thin.I have short hair and big eyes.I am good at singing and danging.I like reading books.I like my classmate,I like my teacher.

There have been many environmental protection problems in recent years . One of the most serious problem is greenhouse gas emissions have caused climate change ,At the same time ,lots of trees have been used and wasted.So our earth is becoming warmer and warmer . .That brings us illnesses and death.

Luckily ，,many countries have done a lot to stop environmental pollution。Its the most important in the environmental protection today.

In my opinion ,on the one hand ,through education we should make people realize that destroying the environment means destroying ourselves,..On the other hand ,we should try to do something to produce fewer greenhouse gas emissions.

In a word .we must develop low-carbon economy

现在这些年已经有很多关于保护环境的问题。其中最严重的一个问题就是温室气体排放已经造成了气候改变。同时，很多树木被砍伐掉了，而且大量别的资源已经被用完或者浪费。所以我们的地球变得越来越温暖(热)。这样带给我们的是疾病和死亡。。

幸运的是，很多国家已经采取了很多措施来控制环境污染问题。如今，这是最重要保护环境的措施。

我认为，一方面，虽然教育我们应该让人们意识到破坏环境就是伤害人类自己。另一方面，我们应该尽力做一些事情来控制温室气体增长。

总之，我们必须发展低碳经济。

the longing summer vacation is approaching, it is the best part of the school year for me. i cannot let the holidays elapse (逝去) meaninglessly, my vacation should be a phase (时期、阶段) of harvest. the events in my plan should give me a sense of infinite potential.

the following plan may reveal the intensity of my desire to travel, work and study in this vacation. in the first few days i want to climb mount hua shan with several friends to refresh ourselves. then i tend to visit relatives, senior school teachers and former classmates(老同学). besides, to find out the best ways to cultivate my abilities, i will find a part time job and conduct some social investigation.

in short, i want to do interesting things in the summer vacation. whatever i do, the goal is the same: to get necessary experience, acquire knowledge and broaden my horizons. though the six week vacation will pass away at lightning speed, its influence is bound to last long.

I were a bird, but the fathers love is the sky, I fly in the fathers care. I am a little fish, and fathers love is the sea, I swam in the warmth of a father.

My father is an ordinary teacher, but in my eyes is the worlds greatest dad.

I remember one year winter, I went to school wearing a quilted jacket, the less I shivering cold, I rub regret didnt listen to mothers words to heart. Then listen to wu slightly said: "Ma Fengqi, your father is coming!" I walked out of the classroom, I saw dad with a smile, holding a cotton-padded jacket, said "here, put on". I put on my winter jacket, warm, the in the mind is warm, father said "later should pay attention to". I tried nodded with a smile. Back home, mother heard that I went to school wearing a quilted jacket, less mercilessly scold me a meal, was going to beat me, dad came over with a smile, say "children dont understand, forget it." I am grateful to look at dad, dad I with tolerance education.

At another time, I ran a curse outside also lied to my mother, mother criticism let me blush with shame, I shed tears of regret. Dad saw hurriedly give me wipe tears, give me a reason, and the mother said: "beat and scold the child is not the best education method, to give them reasonable. After all, was a child." Father has told me a lot of truth, let me be a mistake.

I grew up day by day, know to be grateful parents. When I tired parents pass a hot cup of tea; Finished eating dinner, mom and dad rest, I to wash the dishes.

I have a good father, he let me know what love is. I grew up in love, in the heart lit a lamp that gratitude lamp, light up my life!

我是一只小鸟，而爸爸的爱是天空，我飞翔在父爱的关怀中。我是一条小鱼，而爸爸的爱是海洋，我游弋在父爱的温馨中。

我的爸爸是一名普通的教师，但在我眼里却是世界上最伟大的爸爸。

记得有一年严冬，我上学少穿了一件棉袄，冻得我直哆嗦，我搓着手心里后悔没听妈妈的话。这时听吴微微说：“马凤岐，你爸爸来了!”我走出教室，只见爸爸微笑着，手里拿着一件棉袄，说“来，穿上吧”。我穿上棉袄，身上暖和了，心里更是暖洋洋的，爸爸说“以后要注意啊”。我笑着使劲地点了点头。回到家里，妈妈听说我上学少穿了一件棉袄，狠狠的训斥了我一顿，正要打我，爸爸笑着走过来，说“小孩子不懂事，算了吧。”我感激的看着爸爸，爸爸用宽容教育了我。

还有一次，我在外面闯了祸还对妈妈撒慌，妈妈的批评让我脸红，我流下了悔恨的泪水。爸爸见了急忙给我擦干眼泪，给我讲道理，并对妈妈说：“打骂孩子不是最好的教育方法，要给他们讲道理。毕竟还是小孩子嘛。”爸爸有给我讲了好多道理，让我心悦诚服的认了错。

我一天天长大，知道了要感恩父母。我会父母劳累的时候递上一杯热茶;吃完了饭，爸爸妈妈休息，我来洗碗。

我有一个好爸爸，他让我知道了什么是爱。我在爱中成长，心中亮着一盏感恩的灯，照亮我的人生路!

My day is full of happy every time.

Go to school, mother wakes me up early in the morning, but Im lazy to think: "go to sleep, just a moment, dont be late." If is Sunday, my mother would make me want to sleep as long as you.

After breakfast ready, I will start first thing in the morning, do homework, every Sunday, the teacher will decorate a weekly diary, Ill write my dairy good mother, if passed you can watch TV, but only for half an hour, the third thing is reading, speaking of reading, borrow books are wonderful mother these days.

I have a look at is 1 hour, time had passed so fast, it was already evening, we happily eat supper, happy day is over

我的一天每次都充满着快乐。

要上学的时候，妈妈一大早就叫我起床，可是我却懒洋洋的想：“再睡一会吧，就一会，不会迟到的。”如果是星期天的话，我妈就会让我想睡多久就睡多久。

早饭吃好了以后，我就会开工早上的第一件事，做作业，每到星期天，老师都会布置一篇周记，我先把我写好的周记给妈妈看，如果通过了就可以看电视，不过只能看半小时，第三件事就是看书，说起看书，这几天妈妈借的书都很精彩。

我一看就是1个小时，时间过的真快啊，已经是晚上了，我们高高兴兴的吃过晚饭，快乐的一天就结束了

We went to ZengCheng Park at 8 o’clock . First we dug holes . Then we put the young trees into the holes and filled the holes with earth . At last , we watered the trees .

We were very happy when we finished the work . All of us hope the trees will grow well .

导语：学会感激，你就会少一分烦恼，多一分释然;少一分忧愁，多一分欢笑;少一分抱怨，多一分感恩;少一分孤独，多一分友爱;少一分斤斤计较，多一分潇洒自若。 下面是yuwenmi小编为大家整理的优秀英语作文，欢迎阅读与借鉴，谢谢!

One Sunday afternoon when I was learning to ride my bike, I fell down and hurt my arms badly. As soon as my parents heard this, they took me to the hospital at once. During my stay in bed, they took good care of me and cheered me up. Meanwhile, they helped me with my lessons. With their help, I caught up with my classmates. Now Ill try my best to study well to repay my parents.

【参考译文】

一个星期天的下午,我正学着骑自行车时,我摔倒了,胳膊伤得很厉害。父母一听说,就立刻把我送到医院。在我卧床养伤期间,他们静心照顾我,让我高兴起来。与此同时,他们还帮我学习。在他们的帮助下,我赶上了我的同学,现在我尽我最大的努力来学习好用以报达我的父母。

I live in a happy family, there are five people in my family: mom, dad, grandpa and grandma.

My father very love reading, when I was a student, dad reading a book in the study, but, I come back from school at noon, dad is reading a book in his study. I shouted: "dad, why are you still didnt cook? My belly starving to death!" Dad hurriedly say: "ah! I forget, Im sorry, I go to cook now!" He ran to the kitchen to cooking, cooking.

My mother go to work very hard. Get up at 5 o clock in the morning, at 7:30 in the evening to go home. Come back again at 8 PM, full head big sweat when I come home, I quickly took a towel to wipe a mother.

My grandpa loves to smoke. When time go to the supermarket, grandpa bought a lot of smoke, I urge grandpa: "smoking is bad for your health, dont smoke!" My grandfather said to me: "adult, dont you tube." My grandpa is a stubborn old man.

This is my family.

我生活在一个幸福的家庭里，我家有五口人：分别是妈妈、爸爸、爷爷、奶奶。

我的爸爸很爱看书，我上学的时候，爸爸在书房里看书，可是，我中午放学回来，爸爸竟还在书房看书。我大声叫道：“爸爸，你怎么还没煮饭呀?我肚子饿死了!”爸爸连忙说：“啊!我忘了，真对不起，我现在就去煮!”说完就跑到厨房去炒菜、煮饭。

我的妈妈上班很辛苦。每天早上5点起床，晚上7：30回家。又一次晚上8点回来，回家时满头大汗，我赶紧拿了毛巾给妈妈擦一擦。

我的爷爷特别喜欢抽烟。一次去超市时，爷爷买了很多烟，我劝爷爷：“吸烟对身体不好，别抽了!”爷爷对我说：“大人的事，不用你管。”爷爷真是老顽固。

这就是我的家庭。

i’m going to the sun on my holiday. i will go there by a spaceship. i will take a big blue spaceship。then i’ll pilot the spaceship to the sun. the sun is very hot. so i put on the super-shirt. in the morning, i will have some sun burger for my breakfast.

at eight o’clock, i will play with my friends there. they are super dog and super girl. super dog is white and black. super girl is very clever. super girl and super dog like to play with me. so i play with them for forty minutes. then i do my homework in my little red room on a small blue table. after my home work, i will have my lunch. i will eat sun salad. i will make some red toy bear to the sun babies. i will have red juice, red fish and red rice. all the things are red. then i need a lot of water on the sun because the sun is too hot. so i will walk to the spaceship. i’ll pilot the spaceship to the earth.

this is a good holiday on the sun.

After you come back from guilin to play, in order to let me have a full, and happy summer vacation, I made a plan.

In the aspect of learning in the first place. Because I read too much time, so in the summer vacation I want to read some books more, ensure to read 1 hours a day, and to "engagement" and the book. Every day recite an ancient even, to write a diary, practice calligraphy for 20 minutes. In order to let my English improved, I will read English for 15 minutes. On the basis of doing these, at the end of the holidays in order to I learn more easily, Im ready to prepare the grade five major courses.

Secondly in other ways. I want to go out to travel more, hope I can in the second classroom and learn some knowledge not learn in school. I also want to go to learn swimming, visiting relatives and friends. In addition to these, I will stick to my special skill learning, such as the erhu enough to practice every day 1 hour, Latin dance for distinction, painting teacher assigned homework, etc.

To do well, of course, the health is the most important, so in order to complete my plan, I want to insist to take exercise every day, or cycling, or swimming, or walking.

Since the plan, must be completed on schedule, if not completed on schedule, is white. So I must seriously to complete his plan, not perfunctory.

从桂林游玩回来后，为了让我过一个即充实，又快乐的暑假，我制定了一个计划。

首先在学习方面。因为平时读书时间太少，所以暑假里我要多读几本课外书，保证每天读书1小时，并及时做好“与书有约”。还要每天背一首古诗，写一篇日记，练20分钟书法。为了让我的英语水平有所提高，我还要读15分钟的英语。在做好这些基础上，假期末为了我的学习更轻松，我还准备预习一下五年级的主课。

其次在其他方面。我要多出去旅游，希望能在第二课堂里开阔眼界，学到一些在学校里面学不到的知识。我还要去学习游泳、拜访亲朋好友。除了这些，我还要坚持我的特长学习，如二胡要每天练够1小时，拉丁舞准备考级、画画做好老师布置的作业等。

当然，要做好这些健康是最重要的，所以为了完成我的计划，我要每天坚持锻炼，或骑自行车、或游泳、或散步。

既然制定了计划，就要按计划完成，如果不按计划完成，就等于白制定。所以我一定要认真完成自己制定的计划，不敷衍了事。