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英语九种状语从句全讲

(2016-11-09 17:05:11)
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英语九种状语从句全讲

分类: 语法专家
英语九种状语从句全讲


(一)时间状语从句
1.when, while和as的用法
连词 含义及用法 例句
when “当……时候”,可与延续性动词或短暂性动词连用;从句动作可以发生在主句动作之前、之后或与主句动作同时发生 When you apply for a job, you must present your credentials.当你申请工作时,你必须递交你的有关证书。
while “当……时候”,一般只可与延续性动词连用,从句动作与主句动作同时发生 Mary made coffee while her guests were finishing their meal.客人们就要吃完的时候,玛丽去煮咖啡了。
as “一边……一边……”,常与延续性动词连用,从句动作与主句动作同时或几乎同时发生 As he grew older, he became less active.随着他逐渐长大,他变得不那么活泼了。


—————————————————————————————————————
如果主句表示的是短暂性动作,而从句用延续性动词的进行时表示在一段时间内正在进行的动作时,when, while与as可互换使用。
When/While/As I was walking down the street, I came across an old friend.
我正沿着大街走时,碰巧遇到了我的一个老朋友。
—————————————————————————————————————
2.before与since的用法
(1)before表示“在……之前;还未……就……;还没来得及……就……”。常用于以下句型:
•It will be+一段时间+before ... 多久之后才……
•It won’t be long before ...   不久之后就……
•It was+一段时间+before ...   过了多久才……
John thinks it won’t be long before he is ready for his new job.
约翰认为不久他就能为他的新工作做好准备。
(2)since的用法
①since表示“自从……”,其引导的从句在句中作状语时,主句常用现在完成时或现在完成进行时;从句常用一般过去时。
I have returned home twice since I settled down in the States.
自从我定居美国后,我回过两次家。
They have been living very happily since they got married.
自从结婚后他们一直生活得很幸福。
②since引导的从句的谓语若是持续性动词,常理解为某一状态的终止;若是终止性动词,则理解为某一动作的开始。
He has written to me frequently since he was ill.
自从病好以来,他经常给我来信。
He has written to me frequently since he went abroad.
他自出国以来,经常给我写信。
③since表示“自从……以来”,常用于“It is/has been+时间段+since从句”结构。该句型表示“自从开始(不做)……已经多长时间了”,一般从句的时态用一般过去时,主句中的时态用现在完成时。
As is reported, it has been/is over 100 years since Tsinghua University was founded.
据报道,清华大学已经建立了100多年了。
3.till, until和not ...until ...的用法
(1)until或till表示“某动作一直延续到某时间点才停止”,此时主句谓语动词是延续性动词,主、从句都为肯定式。这两个词可以换用,但till不可以置于句首,而until可以。
Have you heard the meeting will be put off till/until next Tuesday?
这个会议将被推迟到下周二,你有没有听说?
(2)not ... until ... 表示“直到……才”,主句谓语动词必须是非延续性动词。
As far as I know, his mother won’t go to bed until he returns home every evening.
据我所知,他母亲每晚直到他回家才会上床睡觉。
4.表示“一……就……,刚……就……”的常用表达
(1)表示“一……就……”的表达
as soon as, immediately, directly, instantly, the moment, the minute, the instant
The moment I heard the voice,I knew Father was coming.
我一听到那个声音就知道父亲来了。
(2)表示“刚……就……”的表达
no sooner ... than ..., hardly/scarcely ... when ...的时态搭配:no sooner与hardly/scarcely后的句子谓语动词应用过去完成时,而than与when引导的句子谓语动词应用一般过去时。此外,当把no sooner和hardly/scarcely提到句首时,应用倒装语序。
He had no sooner finished his speech than the students started cheering.
= No sooner had he finished his speech than the students started cheering.
他刚完成演讲学生们就开始欢呼起来。
(二)条件状语从句
1.条件状语从句的常见引导词
if, unless (=if ... not), so/as long as (只要), on condition that (条件是), if only (=if), provided that (如果), in case (万一,如果), suppose/supposing that (假设,如果), assuming that等均可引导条件状语从句。
①We will have a picnic in the park this Sunday unless it rains or it’s very cold.
除非下雨或天很冷,否则我们将在本周日去公园野餐。
②My parents don’t mind what job I do as long as I am happy.
我的父母不在意我从事什么工作,只要我高兴就好。
2.条件状语从句的时态
在条件状语从句中,常用一般现在时表将来含义;现在完成时表即将完成之后的情况;一般过去时表过去将来的含义。
If everyone does his part, the project will surely be a success.
如果大家都尽责,这个项目肯定会成功。
(三)让步状语从句
1.although, though, while引导的让步状语从句。
Though/Although/While regular exercise is very important, it’s never a good idea to exercise too close to bedtime.
尽管有规律的锻炼很重要,但临睡前锻炼不是个好主意。
2.as, though引导的让步状语从句需用部分倒装语序。
Hot as/though the night air was, we slept deeply because we were so tired after the long journey.
在长途跋涉之后,尽管夜晚的空气很热,我们还是因为累睡得很熟。
3.“疑问词+­ever”引导的让步状语从句,意为“无论……”。
Wherever you choose to settle down, you should attempt to fit in with the local people.
无论你选择在哪里定居,你都应该尝试做到入乡随俗。
4.whether ... or ...引导的让步状语从句,意为“不论……还是……”,表示正反两种情况都不会影响主句的意向或结果。
We’ll go on with the work, whether we can find the necessary tools or we cannot.
不管我们能否找到所需的工具,我们都要把这项工作做下去。
让步状语从句归纳梳理:让步状语从句,从句是“退让”,主句是“前进”。常由although, though, as(尽管,即使), however(无论怎样), whatever(无论什么), whoever(无论谁), whomever(无论谁), whichever(无论哪个), whenever(无论何时), whether(无论哪里), no matter (who, what, where, when, etc) (无论……), even if(即使), even though(即使), whether•••or,whether•••or not等词引导。
(1)though, although表示“虽然,纵然”之意。
这两个连词意思大致相同,在一般情况下可以互换使用。在口语中,though较常使用,although比though正式,二者都可与yet, still或never,the less连用,但不能与but连用。例如:
Although/Though he was worn out, (still) he kept on working.
虽然他已经精疲力竭了,但仍然继续工作。
Although/Though he is very old, (yet) he is quite strong. 他虽然年纪大了,身体还很健壮。
值得注意的是,although引导的让步状语从句位于主句之前的情况较多,though引导的让步状语从句可位于主句之前或主句之后。例如:
She passed the examination though she had not studied very hard.
她虽然不用功学习,考试却及格了。
although 引导的从句,多指事实,不指设想,故不用虚拟语气;though引导的从句,可指事实,也可指设想,因此,可用陈述语气,也可用虚拟语气。例如:
Although air is light, it has weight. (指的是事实,用陈述语气)
虽然空气很轻,但是有重量。
Though all the world were against me, I would still hold to my opinion. (指的是假设,用虚拟语气)即使全世界的人都反对我,我仍然要坚持我的意见。
当从句的主语与主句的主语相同,从句的谓语又是be时从句可用省略结构,即省略从句的主语和be,这时多用though引导。例如:
The girl, though plain, had a good, kind face.这个女孩虽然衣着朴素,但和蔼可亲。
Though beaten, we were not disgraced.   虽然输了,我们并不丢脸。
though可作副词,置于句末,用逗号隔开,这时though表示“但是”、“可是”的意思;而although无此用法。
The drug is good for your health; it is a litter bitter, though.
这药对你的健康有好处,只是它有点苦。

(2)as, though表示“虽然……但是”,“纵使……”之意。
as引导的让步状语从句必须以部分倒装的形式出现,被倒装的部分可以是表语、状语(即将形容词、副词、分词、实义动词提前),though也可用于这样的结构中,但although不可以这样用。例如:
Object as you may, I’ll go.(=Though/Although you may object, I’ll go.)
纵使你反对,我也要去。
Hard as/ though he works, he makes little progress. (=Though he works hard, he makes little progress.)尽管他学习很努力,但几乎没取得什么进步。
Child as/though he was, he knew what was the right thing to do.(=Though he was a child, he knew what was the right thing to do.)虽然他是一个孩子,但他知道该做什么。
Fast as you read, you can’t finish the book so soon.
纵然你读得快,你也不能这么快读完这本书。
注意:
a. 句首名词不能带任何冠词。例如:
Child as/though he is, he know a lot. 虽然他是个孩子,但他懂很多。
b. 句首是实义动词,其他助动词放在主语后。如果实义动词有宾语和状语,随实义动词一起放在主语之前。
Try hard as he will, he never seems able to do the work satisfactorily.
= Though he tries hard, he never seems…
虽然他尽了努力,但他的工作总做的不尽人意。
有时while也可以引导让步状语从句,“虽然,尽管”之意,同although,此时从句的主语和主句的主语往往为同一人或物,但一般要位于句首例如:
While I like the color, I don't like the shape.我虽然喜欢那颜色,但不喜欢那形状。
While forbidden fruit is said to taste sweeter, it usually spoils faster.
虽然有人说禁果的味道更甜,但它腐烂的也更快。
If也可译为“尽管”、“即使”。例如:
If a jewel falls into the mud, it remains as precious as before.
宝石落到泥里,它仍然和从前一样珍贵。

(3)even if, even though 表示“即使……”,“纵使……”之意,含有一种假设。
这两个复合连词的意思基本相同。它们常互换使用,但意义有细微差别。even if引导的让步从句含有强烈的假定性,而even though引导让步状语从句时,是以从句的内容为先决条件的,即说话人肯定了从句的事实。例如:
We’ll make a trip even if/though the weather is bad.
即使天气不好,我们也要作一次旅行。
Even if he is poor, she loves him. (=He may be poor, yet she loves him.)
即使他很穷,但她还是爱他。
Even though he is poor, she loves him. (=He is poor, yet she loves him.)
尽管他很穷,但她还是爱她。

(4)whether... (or not)   (无论是•••或是•••)
由这一个复合连词引导的让步状语从句旨在说明正反两方面的可能性都不会影响主句的意向或结果。例如:
You'll have to attend the ceremony whether you're free or busy.
不管你忙不忙,都要参加这个典礼。
Whether it rains or not, I shall go out for an outing tomorrow.
注意:以上例句中whether 作“无论”解,用现在时表将来。但当whether作“是否”解时则不能用现在时表将来。例如:
Can you tell me whether it will rain or not tomorrow?  (是否)

(5)“no matter+疑问词”或“疑问词-ever”的含义为“不管……都……”,它们引导的让步状语从句可以互换,但前者引导的从句语气更强烈,口语中也常用前者。例如:
No matter what happened, he would not mind. (=Whatever happened, he would not mind.)无论发生了什么,他都不会介意的。
No matter who you are, you must keep the law.(=Whoever you are, you must keep the law.不管你是谁,你都要遵纪守法。
Whichever (no matter which) book you borrow, you must return it in a week.
无论你借哪一本书,一个星期后必须归还。
Whenever (no matter when ) it rains, this river is flooded.
无论什么时候下雨,这条河总是泛滥。
However (no matter how) hard I have tried, I cannot find the answer.
无论我多么努力,我也不能找到答案。
注意:在however引导的让步状语从句中,however后必须紧跟形容词或副词。例如:
However often you ring, no one will answer. 无论你打多少次电话,都没人接。
However talented a man may be, the collective will always be wiser and stronger.
一个人再有才能,也比不上集体的力量和智慧。
但“no matter+疑问词”结构只能引导让步状语从句,而“疑问词-ever”还可以引导名词性从句。例如:
Whatever (=No matter what) you say, I won’t believe you. (Whatever 引导让步状语从句)无论你说什么,我都不会相信你。
I'll eat whatever (≠no matter what) you give me.
(whatever引导宾语从句)  你给我吃什么,我就吃什么。
Whoever comes will be welcome. (Whoever 引导主语从句) 不管谁来都受到欢迎。

(四)地点状语从句
地点状语从句表示地点、方位,通常由where, wherever引导,可置于句首、句中或句尾。
I cannot hear the professor clearly as there is too much noise where I am sitting.
因为我坐的地方噪音太大,所以听不清教授在说什么。

—————————————————————————————————————
where引导的定语从句与状语从句的区别:
地点状语从句与定语从句的区别在于从句在句中所作的成分,如果作状语,则是状语从句;如果作定语,则是定语从句。
The little girl who got lost decided to remain where she was and wait for her mother. (状语从句,其中remain为不及物动词)
→The little girl who got lost decided to remain in the place where she was and wait for her mother. (定语从句)
那个迷路的小女孩决定待在原地等她的母亲。
—————————————————————————————————————
(五)原因状语从句
原因状语从句可由because, as, since, now that, in that, considering (that)等词引导。
1.because译作“因为”,表示直接原因,语气较强,能回答由why提出的问句。
The old man asked Lucy to move to another chair because he wanted to sit next to his wife.
那位老人让露西换坐到另一把椅子上,因为他想挨着妻子坐。
2.as译作“由于”,语气较轻,常表示显而易见的原因;since (既然), now that (既然), in that (因为),表示双方都知道的原因,语气较弱。as, since和now that引导的从句多位于主句之前。
Now that you have got a job, you should learn to be independent of your parents.
既然你找到了一份工作,你应该学会独立不依靠父母。

(六)方式状语从句
引导方式状语从句的从属连词有as, as if, as though等。方式状语从句应放在主句之后。其中as if或as though引导的从句常用虚拟语气,但如果从句中所陈述的情况很可能实现,也可用陈述语气。
①The house was greatly damaged by the truck.We’d better leave things as they are until the police arrive.
卡车对这座房子造成了严重的损坏。我们最好保持原样直到警察到来。
②The construction industry is no longer as depressed as it was.
建筑业不再像以往那样萧条了。
③The old lady treats the boy as if he were her own son.
这位老太太对待这个男孩就像他是她自己的儿子似的。
方式状语从句归纳梳理:方式状语从句表示主句中动作或状态的方式或方法,多半是用比喻说明主句内容或原物,是被说明的人、物形象具体化。常由as,just as,as if,as though等引导。
1. 由as(如,像)引导
I will do as you told me.   我将会按照你告诉我的那样去做。
The moon has no light of its own as the sun has.    月球不像太阳那样,它本身不发光。
as之前可用just或exactly加强语气。例如:
Most plants need air just as they need water.大部分的植物需要空气,正如它们需要水一样。
as引导的从句谓语句首时,主句常由so引出。例如:
As you treat me, so I shall treat you.    你怎样对待我,我也将怎样对待你。
Just as there are difference forms of matter, so there are different forms of energy.
正像有各种形式的物质一样,也有各种形式的能。
as引导的从句的省略形式:
从句的主语、谓语有时可以省略:
1. 省略主语。无论从句和主句的主语是否一致,从句的主语可以省略。例如:
English is not difficult to learn, as (it )is generally supposed.
(主语一致)英语并不像一般人想象的那样难学。
He wrote as(it) follows.   (主谓不一致) 他写的如下。
2.  省略谓语或谓语中的表意动词。例如:
The study of science needs time, as any other subjects (does).
学科学像学其他学科一样,需要时间。
The electricity does not move through the insulator as it would (move) through a conductor.
电不会像导体一样通过这个绝缘体。
3.  主谓全省略。如:
He worked as usual (=•••as it was usual).   他像平时那样工作。
2. 专有句型
“A•••to B+ what/ as+ C•••to D” (A•••对于B好比C•••对于D一样);“What C•••to D, that A•••to B” (C对于D 恰似A 对于B一样)。例如:
Reading is to the mind what exercise is to the body.   读书之于心灵,犹如锻炼之于身体。
What blood vessel is to a man’s body, that railway is to transportation.
铁路对于运输。好比血脉对于人的身体一样。
3. 由as if, as though引导
两者的意义和用法相同,引出的状语从句谓语多用虚拟语气,表示与事实相反,有时也用陈述语气,表示所说情况是事实或实现的可能性较大。汉译常作"仿佛……似的","好像……似的",例如:
They completely ignore these facts as if (as though) they never existed.
他们完全忽略了这些事实,就仿佛它不存在似的。(与事实相反,谓语用虚拟语气。)
He looks as if (as though) he had been hit by lighting.
他那样子就像被雷击了似的。(与事实相反,谓语用虚拟语气。)
注意:从句谓语如果是be动词,则不论从句主语是单、复数,均用were。例如:
It’s all, all covered with blots as if she were crying on the paper.
到处,到处都是泪痕,像是她趴在信纸上哭过。
It looks as if the weather may pick up very soon.
看来天气很快就会好起来。(实现的可能性较大,谓语用陈述语气。)
as if, as though 引导的从句常用省略形式,往往从句中只剩下介词动词、不定式短语、分词短语或形容词短语。例如:
He opened his lips as if(he was going)to say something.
(不定式短语)他张开嘴唇,好像要说什么。
He walked forward as if(as though)making a speech.
(分词短语)他向前走了几步,似乎要说什么。
The clouds has disappeared as if(they had done)by magic.
(介词短语)云彩好像变魔术似地消失了。
He fell off his horse as if(he had been)shot.
(过去分词被动语态)他从马上跌下来,好像被射中了。
He hurriedly left the moon as though(she were)angry.
(形容词)他匆忙地离开了房间,好像生气的样子。
4. the way, how引导
用于口语或非正式文体中。
the way = the way that, the way in which / in the way
how = in whatever manner
He doesn’t speak the way I do.  他说话的方式和我的不一样。
Do it the way you were taught.  要按照教导你的那样去做。
This steak is cooked just how I like it.  这牛排正式在按照我喜欢的那样去做。
5. 由like引导
在口语或非正式文体中,有时可用like代替as或as if。例如:
I wish I could paint like(=as)he did.   我希望我能像他那样画画。
It rained like(=as if)the sky were falling.   下着大雨,好像天要塌下来似的

(七)结果状语从句
1.引导结果状语从句的从属连词有:so ...that ..., such ...that ...。在非正式语体中,由so ...that ..., such ...that ...引导的句子中的that可以省略,注意其结构形式:
so+形容词/副词+that从句so+形容词+a/an+可数名词单数+that从句so+many/much/few/little 少+名词+that从句
such+a/an+形容词+可数名词单数+that从句such+形容词+可数名词复数/不可数名词+that从句
①He is such a learned person that we admire him very much.
= He is so learned a person that we admire him very much.
他如此有学问,以至于我们非常赞赏他。
②It is such fine weather that we all want to go to the park.
天气如此晴朗,以至于我们都想去公园。
③He earned so little money that he couldn’t support his family.
他挣这么少的钱,以至于养不起家。
2.当so或such所在的主句主语与结果状语从句中的主语一致时,还可简化为:so/such ...as to ...。
He was so clever a student that he was able to work out all the difficult problems.
= He was so clever a student as to be able to work out all the difficult problems.
他是一名如此聪明的学生,以至于他能够解决所有难题。

(八)目的状语从句
引导目的状语从句的从属连词有:so that, in order that, for fear that, in case (that), lest等。
1.in order that和so that引导的目的状语从句
两个连词都意为“以便……;为了……”,它们引导的状语从句中常用情态动词。
When he goes out, he often wears sunglasses so that/in order that nobody/no one can recognize him.
他出门的时候常戴着墨镜,以便没人能认出他。
2.for fear that, in case (that)和lest引导的目的状语从句
引导目的状语从句时,for fear that表示“害怕,担心某事会发生”;in case (that)/lest表示“以防出现某种情况”。
①The boy hid himself behind the tree in case/for fear that his father should see him.
那个男孩藏在树后面,以防他父亲看到他。
②Take your raincoat in case/lest it should rain.
带上雨衣以防下雨。
(九)比较状语从句
比较状语从句表达人或事物的属性或特征的不同程度。常由as•••as(和•••一样),not as / so•••(不像•••那样),than(比),the•••(越•••越•••)等引导。
1. as+原级+as(第一个as是副词,含“如此”的意思,在主句说明所比内容的程度;第二个as是连词,含“比”或“如此”的意思,引导从句)。例如:
Our classroom is as big as theirs.   我们的课室跟他们的一样大。
I hope you like it as much as I do.   我喜欢你跟我一样喜欢它。
在这种结构中,比较成分的前面常用表示倍数的词如•••times(•••倍),twice(两倍)等来表示相比较的两个成分相差的倍数,通常译作“像•••几倍那样多”,“是•••的几倍”。例如:
The speed of sounds in water is about four times as great as in air.
声音在水中的速度是空气中的4倍左右。
This book is twice as thin as that one.  这本书的厚度是那本书的二分之一。
2. “no+比较级+than”(不比•••多,不少于)。no是副词,在主句中作状语,修饰形容词或副词的比较级;than是连词,引导从句。例如:
Tom is no less diligent than peter.   汤姆用功不比彼得差。(汤姆和彼得同样用功)
He feels no better today than he did yesterday.
他今天的感觉不比昨天好。(他今天的感觉跟昨天同样不好。)
3. not so / as •••as(不像•••那样,不如)。第一个as/so是副词,在主句中作状语,修饰其后的形容词/副词;第二个as是连词,引导从句。not so•••as比not as•••as用得比较普遍。例如:
The weather is not so cold as it was last winter.  天气不如去年冬天那么冷。
It is not as easy as you think.   事情并不像你想的那么容易。
The work did not go so smoothly as we hoped.   这工作并不像我们希望的那样顺利。
4. 形容词/副词的比较级+than+被比较的对象。表示两个人或事物在某(些)方面的差别。than是连词,引导从句。后面被比较对象如果是名词,多用省略形式,省去与主句中相同的部分。
This flower is less beautiful than that one but sweeter than that one.
这朵花不如那朵花看,但比它香。
Man grows faster than the planet he inhabits.
人类成长的速度远比他居住的星球快得多。
从句中的主语(名词)如果与主句中的主语一致,为了避免重复,常用that代替不可数或某些可数名词,用those代替可数复数名词,用one或ones代替可数名词。例如:
The result of this experiment is better than that of the last one.
这次实验的结果要比上次好。
The students in our class are more diligent than those in their class.
我们班的学生比他们班的学生用功。
比较状语从句的动词,如果与主句的谓语动词一致,且为行为动词时,常用do(does,did)代替,以免重复。例如:
We have produced even more coal this year than we did that year.
我们今年出产煤要比去年出产得更多。
We seemed to understand human nature as well as do science.
你不但通晓科学,而且似乎也同样洞察人性。
She drives better than her husband does.  她开车开得比她丈夫好。
as•••as,not so / as•••as, than 引导的比较状语从句的省略形式:
1. 省略主句。例如:
I read as many pages as(they)are required(to be read). (主、从句的主语不一致)
我读了我该读的页数。
The winters in Hangzhou are not so mild as(they)are in Guangzhou. (主、从句主语一致)
杭州的冬天没有广州的冬天那么暖和。
He eats more than is good for him.  他吃的太多,对身体没好处。
There were more casualties than was reported.   伤亡人数比所报道的要多。
2. 省略谓语。例如:
She is more highly regarded than he.  (主、从句主语不一致)她比他受到更高的重视。
Sometimes it is as hard as rock.   (主、从句主语不一致) 有时它和岩石一样硬。
3. 省略主语和(部分)谓语。例如:
Work is as necessary for sound mind as(it is necessary)for sound body.
(主、从句主语一致)健全的精神需要工作,就像健全的身体需要工作一样。
Mother loves me as dearly as her.   母亲爱我, 我也爱她。
When I spoke to him on the phone this morning, he was more agreeable than(he was)last night. (省略主句和部分谓语)今天早晨我在电话里跟他讲话时,他比昨天要随和。
4. 省略宾语。例如:
That’s as good a place as I can find.  (从句as可看作是关系代词)
那是我所能找到的一个好地方。
5. 句型the•••the•••(越•••越•••)。即:
从句:the + 比较级•••,主句:the + 比较级•••
The more we study, the more we discover our ignorance.我们越学习,就越发现自己无知。
主句如果是将来时,从句可用现在时代替将来时。例如:
The longer the treatment is delayed, the worse the prognosis will be.
延误治疗的时间越长,预后越差。
“the•••the•••”句型通常是从句在前,主句在后;这时,主句和从句均用倒装语序。有时,主句在前,从句在后;这时,主句不必用倒装语序,分句之前通常不用逗号。例如:
An object draws the harder, the more matter it contains. 有的物质越多,它的引力就越大。
I like you(the)more, the more I know you.我越了解你,就越喜欢你。
主句的主、谓语有时可用半倒装语序,以保持句子的平衡。例如:
The more you read, the better will you write.  你读得越多, 写得就越好。
“the•••the•••”句型的省略形式。这种句型的句子如果意思明显,用省略句的很多:主句的主语和动词可以省略,有时主句和从句的主语和动词都可以省略。例如:
The more, the better.   越多越好。
The higher the temperature(is), the greater the pressure(is). 温度越高,压力越大。

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