开学演讲稿高中英语【热门20篇】

新的学期开始了，我们迎来了新学期的第一天，我们又站在了这个老地方，开始我们新的历程。

路还是昨天的路，但里程碑已是新的;歌还是昨天的歌，但今天唱出的更动听;太阳还是昨天的太阳，但它放射出的却是全新的光芒。让我们看一下东方的第一抹朝阳，是否要检查一下自己：我的梦是否还在，我的心是否还在飞扬?

在众多人走过之后，道路上还复空寂，但道路自身更加坚实。历史过后，时间隧道于冥冥之中存留着历代的印痕与洪钟，我们时常感受到那激越的惊雷闪电。现在，我们又面对新的一年，我们就是今天，就这个世界的主宰。

很多东西在追求前是个梦，追求过程中是篇诗，追求后则是一首老歌。惟有追求的过程是最美丽、最浪漫的时节。只要在追求，收获就会有的;只要在奔走，路就不会荒芜;只要在爱着，心中就永远充满温馨。你爱大自然的时候，也就爱了自己，因为你是大自然中的一片叶，有什么是明天能看到的，如果你没有抓紧今天。如果今天是张弓，那么你就是弦上待发的箭，抓紧便是把弓引满，你就直奔明天的靶心。当你梦想成真的时刻，就是你触摸到生命价值的时刻。

Ideal is good, is happy, is the ideal starting point for success. I think, every student has a beautiful ideal, to ask what is my ideal, I would say: "my ideal is that when a CCTV news".To ask why I have this ideal, or from the start of life. "CCTV news broadcast" is our Chinese important news, not only we the people of the whole country, there are many foreigners will see, so the occupation represents the image and language level in china. There is a reason: this work can make our country peoples access to the latest news, let us Chinese political connections. In this work the way repay our great motherland mother.The ideal is behind the efforts of one hundred thousand and difficult challenge. In the future days, I will try my best to learn culture while learning about presided over knowledge, and from the aspects of improving, show ego, challenge higher field. If you want to succeed, must fix its body, like a candle, you want to burn it up, there must be a match, the match is our efforts.The ideal is a life, in our heart sowed the young; the ideal is a whip, let us work hard; my ideal is that when a CCTV news, it is my life goal.

理想是好的,是快乐的,是成功的起点。我认为,每个学生都有一个美好的理想,问我的理想是什么,我会说:“我的理想是当一个央视新闻工作者”。问我为什么有这样的理想,因为这来源于生活。“央视新闻联播”是我们中国重要的新闻,不仅我们整个国家的人民,有许多外国人会看到,所以职业代表着中国形象和语言水平。还有一个原因:这个工作可以使我们的国家人民访问到最新的新闻及了解我们中国的政治关系。以这样工作的方式来偿还我们伟大的祖国母亲。理想的背后是十万年的努力和困难的挑战。在未来的日子里,我将尽我最大的努力学习文化,学习知识,学习改善这些方面,展示自我,挑战更高的领域,如果你想要成功,必须修复它的身体,像一根蜡烛,你想烧掉它,必须有一场比赛,对手是我们的努力。理想是生命,在我们心中播下了年轻;理想是鞭子,让我们努力工作,我的理想是当一个央视新闻工作者,这是我的人生目标。

When students go into college, they need to join in the group, because there is no way for them to live alone. They have new classmates and roommates. How to fit in the group is the main problem for them to solve. A successful student can handle it well.

To fit in the group, the students must have the collective consciousness. As most students are only child in the family, so they don’t know how to get along well with their roommates. They always notice themselves and ignore others’ feelings. But as they live in a dormitory, they need to realize these. Only in this way can make everybody live in a harmonious environment.

To fit in a group, students also need to be honest. As many students live in a common surrounding, it is easy to have conflict, because different cultures happen among students from different regions. Then it is important to be honest and try to talk about the problem, or the conflict will bigger.

It is a big lesson for students to learn get along with others. The one who handles well are trend to be get successfully easily.

因为有你，妈妈，我生病时总是那么快好，每次我生病，你总是那么啰嗦，不过就因为你的啰嗦，我每次生病都那么快好，我记得一段模糊又很感动的一次生病，我发高烧，你在医院无微不至的照顾，让我觉得我发烧退了就都是你的功劳。那感动画面一直烙在我心里。

那一天晚上下着倾盆大雨，我在发着高烧，因为下着雨，我发烧39摄氏度变成了41摄氏度，你越来越着急，拿着病历本和伞就带着我去医院，可现在下着雨，很难打到车，我们就走了了一会儿，我发现你老是把伞偏向我这边，你都淋湿了，那时我就在想：“我那么不听话，你还那么疼我”你打到车了，在车上你一直啰嗦有没好点啊，可能是车上的噪音影响了我所以后面的都没听清楚，到了医院你让我坐在大厅里，可能是我发烧发晕了，似梦非梦的看着你忙碌着挂号，你带我给医生检查，医生说要打针，我也没说怕，你就一直旁边唠叨着：“不痛的，就像被蚂蚁咬了一下”我在大厅打点滴，我注视着你嘴里油然而生的说了一句：“妈，你累了吧”说完我的潜意识才反应过来。你就这样陪着我，我靠在他的肩膀享受的睡着，突然你的头靠在我头上，我就醒过来，看你睡的香我就不敢动，怕打扰你的好梦，可是我一动就把你弄醒了。我打点滴要一个星期，每次都是你陪我的，打完点滴回家下着毛毛细雨，你的手搭在我肩膀上撑着伞，不让我被那极小的细雨碰到，不过还是碰到了，看见新开张的店门有气球，你就跟那姐姐拿了好多给我玩，我就拿着那几个圆鼓鼓的气球回家，回家后你就逼着我喝那难喝的药，我在反抗，我很爱吃糖，就用白糖诱惑我喝药，没办法，经不住糖的诱惑，就喝药了，就是因为你的诡计多，所以我才会乖乖的喝药。就是你的啰嗦，我生病才那么快好，就是你的诡计多，我生病才会怪怪的喝药，你无微不至的照顾，那一点一滴我都急在心中，因为有你妈妈，我生病才好的那么快，谢谢你为我付出这么多，虽然你很啰嗦，但也是为我好，这种为我好的啰嗦，才让我每次生病好的那么快。

因为有你，妈妈。

减负，减负。从小学到现在上面一直都这么喊着，以前光喊不做，大家戏称之：减“负”等于加正。但是这次真的有行动了。新规定下来了：星期五下午放假，周末不补课;早上7点才起床，8点半上课。我们有充足睡眠时间和饮食时间。星期五下午就可以回家，无须等到星期六补完课或四周一次的月假才回家，真是大快人心啊!

星期五下午回到家，吃完饭不久便睡觉了，消除一周来的疲惫。

大概是习惯吧，第二天我很早就醒了，一看钟，才6点半。于是我去叫爸爸起床出去锻炼一下，爸爸欣然答应。

一出门清新的空气迎面扑来，多么舒服啊!我们慢跑到公园，已经有一些老人在锻炼了。活动一会儿后，我听见树林里有一阵清脆的鸟啼声。我不觉停下来，聆听这美妙的声音。

很久没听到这清脆的声音了!我记得原来下学功课不多时，我就经常和爸爸来这里锻炼身体。上了初中后，我就没来了。要不是这次减负，我说不定会忘了这优美的声音了。

这时一只鸟儿飞出林子，似乎去找虫子了。这不禁让我想起“早起的鸟儿有虫吃”这句话。我明白了，学校虽然把时间交给了我们，但我们还是要合理安排好时间，做到“学习生活两不误”。

1. a big headache令人头痛的事情

2. a fraction of 一部分

3. a matter of concern 焦点

4. a series of 一系列,一连串above all 首先,尤其是

5. absent from不在,缺席

6. abundant in富于

7. account for 解释

8. accuse sb. of sth.控告

9. add to增加(add up to)

10. after all 毕竟,究竟

11. agree with同意

12. ahead of time / schedule提前

13. ahead of 在...之前(ahead of time 提前)

14. alien to与...相反

15. all at once 突然,同时

16. all but 几乎;除了...都

17. all of a sudden 突然

18. all over again 再一次,重新

19. all over 遍及

20. all right 令人满意的;可以

21. all the same 仍然,照样的

22. all the time 一直,始终

23. angry with sb. at/about sth.生气,愤怒

24. anxious about/for忧虑,担心

25. anything but 根本不

26. apart from 除...外

27. appeal to 吸引，申诉，请求

28. applicable to适用于

29. apply to适用

30. appropriate for/to适当,合适

在烈日与风雨中，因为有了你，生命从此不再黯淡。

在忧伤与绝望中，因为有了你，我看到了明天的希望。

在现实与残酷中，因为有了你，我等待着那美好的明天!

现在的我，作为一个中学生，必须面临着那枯燥而乏味的书本知识，我当然会被沉重的压力所压垮了，之后，我愈加的烦恼，不自信，这样，我的学习态度也变差了，成绩也呈下降趋势，对于我来说，整个世界都是黑暗的。

在那些日子里，我仿佛与世界隔离，我生活在另一个世界里，在那个世界里，惟独我一人，当我困苦时，没有可以谈心的人;当我恐惧时，没有可以依靠的人;当我不知所措时，没有可以指引明路的人。我，没有欲望，没有目标，没有追求!

在那一次的夏季，因为我考试又考砸了，我好像感觉到我的头顶上有块乌云始终笼罩着我，我一个人躲在房里，坐在窗前呆呆地看着窗外那滴落着的雨滴，不知不觉中，你进来了，你似乎看透了我的心思，语重心长地对我说：“也许你现在觉得你已经失败了，如果你真的这样想，那你就真的失败了，如果你认为你一定行的，那你就成功了一半。”听着你的话，似乎领悟到那几分真理，使我突然想通了许多。

虽然你只说了那简短的几句话，却始终在我耳边回响。让我在那万丈深渊里，一步一步的往上爬，你看到了我的进步，更加地鼓励我，要我挑战自己，战胜自己，你的话就像那太上老君的灵丹妙药，充满了神奇与魔力。

因为有了你，有了你那思想性的话语，有了你那真诚无私的劝告，有了你那满怀憧憬的期望，我调整了自己的心态，虽然我还是有那么一点的小害怕。但我坚信着。我决然不能放弃，我努力着，奋斗着，我对你说：“我会努力的，为了那美好的明天!”一切都变化得如此之快，在你的鼓励下，我一下子进步了许多，我把我的变化告诉了你，我突然也看到了你笑时的那美丽的弧线。

我没有什么靓丽的语言赞美你，也没有什么优美的词汇来描绘你，我只能感谢你，同时我也庆幸我有了你。

有时，我在幻想，有时我在祈祷，有时我在追求——那明天的梦，因为有了你，我想，这并不困难。因为有了你——父亲!

Since we go to school, the teachers educate us to be a better person, they

tell us that we must study hard, so that we can be the useful person. Many

students confuse about what is the useful person. In my opinion, the useful

person must have the good merit.

A person with the kind heart is favored by everyone and he has the sense to

serve others. The bad person will bring danger to others, even to the society.

The most important thing of the useful person is to make a contribution to the

society.

They will make full use of their knowledge and be proud of serving for the

society. Our premier Zhou stated his purpose of learning knowledge was to make

our country rise. He did it and he became the great person. Becoming the useful

person is not easy, we should fight for it.

Today is the first day of this new term. After a long summer vacation , we all waitting for this day. I bring my new packbag and going school happily.

When I walk into our new classroom,I meet my best friend，he is taller than he used to be. Then I see our teacher，he(she)is as strict as before. I look around ,all the classmeets are very excited，and so am I.

I wish I will do better this terms， and I will try my best!

Almost everyone wants to live a long life, but longevity is not for all

people. It is reported that most long life people are in villages, far away from

big cities. In village, life is closer to nature. The sky there is clear and

pretty; the air is fresh; the water is clean; and the food they eat are natural,

without any chemicals. Besides, those villages are abundant in green trees,

beautiful flowers, fresh fruit, and wild animals, which can evoke peoples

passions for life. Moreover, the living pace in those villages is rather slow.

People suffer less stress than cities’. Thus, they have more freedom to enjoy

what they like. No wonder that most villagers are strong and healthy. If I

become old someday, I would like to move to village to enjoy a more comfortable

and pleasant life.

Today is my birthday and Im so excited about it.In the morning I put a

note on the table for my mum and it said,"Today is my birthday,dont forget

it!"At school,I got many gifts and cards for my classmates and had a lot of

fun.But I was still expecting the birthday party after school.

When it was time to leave school I couldnt wait to go home.When I open the

door,there wasnt anybody in the house.There was only a note that said,"Coming

home late tonight,mum and dad."I try to call them but there was no answer.I was

so shocked,do they forget my birthday?How could this be!I was so sad that I

couldnt eat anything.I just did my homework and waited for them.

And then,things changed completely.It was about time for dinner,my mother

called and told me to go to the restanrant near our house.When I got there I

couldnt believed my eyes.Everybody was there:my parents,my relatives,my friends

and even my classmates.There was so many gifts and a big cake.What a surprising

birthday party!We had a good time and it was the best birthday party ever.

老子有云:“合抱之木，生于毫末;九层之台，起于垒土;千里之行，始于足下。”

流年似水，初中三年一晃而过，我们由一个个少不更事的少年锤炼成为焕发青春气息的高中生。眉宇间的幼稚不复存在，思想变得厚重，笑容变得沉稳。曾经的考验使我们成熟，曾经的挫败使我们坚强，曾经的努力使我们精彩。然而，生活画卷中最绚丽篇章正向我们展开，若想挥舞出最浓重的一笔色彩，还需脚踏实地地走完这千里之路。

或许你还迷恋于昨日已逝的辉煌，或许你陶醉于设想中明天的灿烂，可你偏偏忘却:昨日的美好留下的只有回忆，明天的灿烂也仅仅是一片虚无，能抓住的，只有这无法逃逸的今日!

步入高中，意味着我们在人生之路上已经成功迈出了一步，可这也揭开了另一个挑战的神秘面纱，我们感激命运，将一个个挑战在我们这充满无限激情和活力的青年时代铺开，让我们蜕去年少的脆弱，将我们的胆识和勇气，坚强和毅力化作坚硬的双翼，冲向那重重巨浪，似那海燕呼唤:“让暴风雨来得更猛烈些吧!”

人生之路，何止千里?短短数个寒暑，却可能决定一生的命运。可我们无需驻足，只需鼓起勇气自信地向着心中的理想迈出坚实的第一步，前进道路上的坎坷，也只是走向成熟的必修课而已!高中三年的画卷在我们面前缓缓张开，多姿多彩的生活在我们脑海中闪过。我们学习并不是为了考试，也不是为了交一份成绩单给老师，父母，而是为将来的发展奠定基础，拥有综合能力才能成就一番业绩。高中三年，我们不但要在学习上你追我赶，永不言弃。更要在各方面全面发展，百花竞放，让多姿多彩的高中生活成为我们人生命途中最华丽的点缀。假如你在音乐上颇有领会，请用你的音乐谱写一曲精彩;假如你在绘画上颇有造诣，请用你的画笔挥舞一段传奇;假如你在舞蹈上颇有体味，请用你的身姿舞动一支青春舞曲。假如你在文学上颇有兴趣，请你提起你的钢笔，记下在你我之间，那永不老去的夏天。

展望明天，一串串清晰的脚印在我们身后延伸;理想在汗水的浇灌下发芽成长……

一位诗人在一首诗中这样写道:人的一生分为三天，昨天、今天和明天。昨天已经过去，今天在你脚下，明天是未来，是希望，是召唤，是挑战。同学们，我们风华正茂，让我们坚定地挥手与昨日告别，牢记“千里之行，始于足下”的警言，坚实地迈出千里之行的第一步。

开学典礼后，我们新的征程开始。

The quality of human life has improved greatly over the past few centuries, but Earth is being harmed more and more by human activity. As we develop our technology, we demand more from our planet. Eventually, this will harm people as well.

Our planet gives us everything we need, but natural resources are not endless. Strip mining devastates whole regions, leaving bare and useless ground. Deforestation removes old growth trees that cant be replaced. Too much fishing may harm fish populations to the point where they cant recover. We are too careless in taking what we want without giving anything back.

There are more people than ever, living longer that ever. So is it any surprise that many areas suffer from too much development? Anyone living in or near a city has experienced "urban sprawl". There is a new shopping area on every corner and new houses, townhouses and apartments everywhere. Traffic gets worse and worse because planners cant keep up with growth. Keeping up with human demand is hard enough. Environmental concerns come in last.

With growth comes pollution. Companies and communities dump waste into water. Landfills are full of trash. Emissions from factories pollute the air. Barrels of industrial waste and worse, radioactive waste, have no safe place to go. If were not careful, we can harm our planet beyond repair.

People need to respect the Earth and try to preserve it. If we dont, what kind of future will we have?

为丰富中学生的环保知识，培养防护意识，学校英语社针对我国雾霾天气频现，危害严重的现状，决定在学生中举行英语征文比赛。请你根据以下提示写一篇短文参赛。

1．雾霾天气的危害：

2．雾霾产生的原因；

3．自我防护的方法。

参考词汇：尾气排放：exhaust emission

雾霾天气：hazy weather

注意：1．词数：120_-150；

2．可适当增加细节，以使行文连贯。

Nowadays, the hazy weather frequently appears in our country. It has not only done harm to people’s health, but also affected the public transportation. Terrible accidents happen every now and then, some highways have to be shut down because of the low visibility.

Obviously, air pollution is the main factor that has resulted in the frequency of hazy weather. At the same time, smoke from burning coal and all kinds of dust are also important factors. Besides, exhaust emission from cars and buses has made the situation even worse.

So proper measures should be adopted to deal with the serious problem. To students, opportunities for outdoor sports activities should be decreased, washing faces and hands with running water after each outing is also important, and do not forget to wear a good-quality mask to protect yourself while going out.

I hope we will regain a fresh, clean and bright world soon.

[高中英语作文：雾霾

Good morning th teachers and fellow students. Today we would like to introduce a few favorite books to you.

My favorite book is (Italian: Cuore). This is a diary written by an Italian boy Enrico. The diary is about his life and study. It included various touching stories that happened around Enrico, the mottos taught by his parents, as well as the wonderful ten "monthly" stories told by his teacher during the class. Every word in the chapter describes the word "love". From patriotism to friendship, and to the love between parents and child -- really touching.

This novel taught me how to love, and how to learn from love. I really like this book very much. How about you? What is your favorite book?

My favorite book is . Have you read it before?

Oh, I haven’t read this book before. What is it about?

Well, it is a story of a rich girl who maintained her noble character after the bankruptcy of her father. The story is happy ending.

Can you tell the us why you love this book so much?

Sure. It is because the story taught us to be brave and to face the challenges and difficulties with courage. I am deeply impressed by the strength and perseverance of the little princess in the story. I have decided to learn from her from now on.

Oh I see, the story sounds very good. I cannot wait to read this book as well.

Im glad to have started school at last! Because I miss my teachers and classmates very much.

I can play with my little friends happily. I have lessons with my classmates and study together.

But getting up early in the morning is a bit of a habit. But it doesnt matter. I believe it will be good to be fit for a few days.

Everyones heart should have a plan for the new term. My plan is to listen carefully in class, the first thing is to go home to finish the homework, and then again. I want to study on my own initiative. I cant wait until my mother says she will study. But sometimes mom is not sure I can do it myself. In fact, I have grown up sensible, mother do not worry so much.

I hope I can hit 300 points at the end of the term, and mom will give me the prize! Im not just trying to get a prize. I want my mother to know, "I can do it."".

[开学的英语日记

China has the history of more than 5,000 years. Many foreign people are

attracted by this big old country. They come here and want to know about the

traditional culture. However, Chinese young people dont show much interest in

the old culture, instead they chase the fashion and some even abandon the

precious culture. For example, paper cutting, one of the excellent arts that is

inherited by our ancestors. Many foreign media speak highly of this great

handicraft and they are astonished by the wisdom of Chinese people. I have seen

this art when I stay in my hometown. Only few old people can do it. They just

take it for killing time. Paper cutting is like the old fashion and is forgotten

by the young generation. The media should report more positive information about

the traditional culture to inspire the young people to learn.

Today is Halloween in the west. I went to suzhou park with my parents and went to Halloween.

I feel very lively as soon as I get in! Many, many monsters! They are all tourists. Then I saw the floats! The people on the float came down, cats, death, vampires and so on. I took pictures with them.

The most dynamic is me (wang xin), I am wearing orange pumpkin, with pumpkin cap and pumpkin basket, I am the pumpkin fairy! Dad wears a skeleton head mask, mom with a fluorescent stick, we are the devil combination, we follow the crowd to the Caribbean square. Oh! It turned out that there was a performance, and the show was a dance, and it was wonderful. Whos patting me on the shoulder when were looking at it in high spirits? I looked back, and there was a monster that startled me! The actor finished his performance and ran off to frighten every...

关于城市介绍高中英语作文篇1

The city of hangzhou lies in the southeast of china and faces the east sea. it is famous for its beautiful west lake with a long history.whenever you come to this modern city you will see many parks and some places of interest around the west lake. during the holidays or festivals or at the weekends, people like boating on the water or walking on the paths of the woods or sitting on the ground to have a picnic. what a good time they have! since the politics of the reforming and opening were carried out by the government of hangzhou, plenty of tall buildings have been set up and great changes have taken place in this city.

杭州位于中国的东南，东临东海，以美丽的西湖而闻名于世。无论你什么时候去杭州，都会看到许多公园和名胜古迹环绕着西湖。节假日人们喜欢在西湖上荡浆，在小树林里漫步，或者坐在地上野炊，度过愉快的时光。自改革开放以来，杭州发生了巨大变化，许多高楼大厦拔地而起，呈现出新面貌。

关于城市介绍高中英语作文篇2

Beijing is an ancient city with a long history. Back in 3000 years ago in Zhou dynasty, Beijing, which was called Ji at the moment, had been named capital of Yan. Thereafter, Liao, Jin, Yuan, Ming and Qing dynasty all made Beijing their capital. Therefore, Beijing was famous for "Capital of a thousand years".

The long history leaves Beijing precious cultural treasure. Winding for several kilometers in Beijing area, the Great Wall is the only man-made structure that could been seen in the space. The Summer Palace is a classic composition of ancient royal gardens, and the Forbidden City is the largest royal palaces in the world. Tiantan is where the emperor used to fete their ancestors, and also the soul of Chinese ancient constructions. The four sites above has been confirmed world cultural heritage by UNESCO. However, the best representatives for Beijing are the vanishing Hutongs and square courtyards. Through hundreds of years, they have become symbol of Beijings life. Tiananmen square being still brilliant today with cloverleaf junctions and skyscrapers everywhere, the old-timey scene and modern culture are combined to present a brand new visage of Beijing.

As Beijing has been confirmed home city of Olympics 2008, the spirit of "green Olympics, scientific Olympics and humanized Olympic" will surely bring more and more changes to Beijing, promote the development of sports and Olympics in China as well as in the world, and strengthen the friendly communications between Chinese and foreign people.

Clothes are so significant in our daily life that we cant live without

them, because they are useful in many ways. For example, clothes could keep us

warm in winter and protect our skin from the heavy sunshine in summer. Whats

more, Clothes make a man just as a saddle makes a horse. Everyday we wear

different kinds of clothes to make ourselves more attractive. Suppose if we wore

the same clothes all the time, our life would be so boring.

As far as Im concerned, I know some kinds of clothes, such as formal

clothes, casual clothes, evening wears and uniforms. In different situations, we

wear different clothes. For example, we wear formal clothes to go to meetings;

we wear casual clothes at home; we wear evening wears to attend evening parties,

and we wear uniforms at school or at work.

Nevertheless, I prefer casual clothes, because they are comfortable. And

they are also very cheap. When I wear casual clothes, I can do a lot of sports.

It’s so cool. By the way, red is my favorite color, since Ive got a white skin.

If Im in red, Ill look kind and friendly. So I always buy red clothes when

shopping.

1 Shaven – unshaven

1刮过的-没刮过的

2 Predictable – unpredictable

2可预言的-不可预言的

3. Practical – impractical

3.实际的-不切实际的

4. Patient – impatient

4.耐心的-不耐心的

5. Reliable – unreliable

5.可靠的-不可靠的

6. Regular – irregular

6.正常的-不正常的

7. Social – antisocial

7.爱交际的-不爱交际的

8. Attach – detach

8.附着-分离

9. Respect – disrespect

9.尊敬-不敬

10. Exhale – inhale

10.发出-吸入

11. Possible – impossible

11.可能的-不可能的

12. Cooked – uncooked

12.煮熟的-未熟的

13. Introvert – extrovert

13.内向的-外向的

14. Voluntary – involuntary

14.志愿的-非志愿的

15. Responsible – irresponsible

15.负责的-不负责的

16. Do – undo

16.规定-取消

17. Important – unimportant

17.重要的-不重要的

18. Precise – Imprecise

18.精确的-不精确的