If they become infected,especially after the first three months of pregnancy, they can get very sick or even die.

VOA: special.2009.08.18

That's why people are so excited about embryonic stem cells because in nature they become all the cells of the body.

这就是为什么胚胎干细胞如此让人激动,因为它的天然功能就是变成所有身体细胞

耶鲁公开课 - 生物医学工程探索课程节选

This hasn't really been studied but my guess is they become worse and worse for the reason I mentioned before.

原因还没有研究 但我猜测,导致人们的估测越来越遭的原因我提起过

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选

They become sticky and harden into the shape of the letter C, like a sickle, a hand tool with a curved blade.

VOA: special.2009.12.16

Well, one way would be to isolate individual cells and culture them outside the body and see what they become.

一个方法就是分离单独的细胞,然后进行体外培养看看结果

耶鲁公开课 - 生物医学工程探索课程节选

Why did they become so famous? The story of these famous men began a little before the American Civil War of the eighteen sixties.

VOA: special.2010.03.10

She measured the distance between the bones in the finger, because when we get older, the space becomes smaller-- they become tighter.

她测量指骨间的距离，人越老，骨骼间空隙变得越小-,指骨变得更紧。

哈佛公开课 - 幸福课课程节选

The GINA report suggests that asthma rates in developing countries increase as they become more westernized.

VOA: special.2009.07.28

And so when they become very, very closely spaced there is mutual repulsion of those electrons.

所以当它们越来越近的时候,这些电子会产生相互的排斥力。

麻省理工公开课 - 固态化学导论课程节选

Sometimes they become angry or sad,hear voices, or see things that are not there.

VOA: special.2009.12.28

And bathing inside the inner ear fluids where they become stimulated by sound waves and acceleration forces.

毛细胞悬浮在内耳液中,接受声波和其它外力的刺激。

斯坦福公开课 - 7个颠覆你思想的演讲课程节选

The raw materials are struck over and over until they become loose.

VOA: special.2009.07.06

So banks that become a member of the Federal Reserve System get shares and they become stockholders in the Federal Reserve Bank.

所以，联邦储备银行的会员银行,得到股份并且在联邦储备银行成为股东,它们分得股利。

耶鲁公开课 - 金融市场课程节选

Or they become sick for only a day or two.

VOA: special.2009.05.26

They become legally part of the land, literally.

他们通过法律上成了这块土地的一部分

耶鲁公开课 - 欧洲文明课程节选

They become lamb chops. Tasty ones,says David Johnson.

VOA: special.2009.07.14

And furthermore from that, let's say they survive and then they become productive members of society who go home and start like a million charity organizations and this and that and this and that.

此外，假定他们活了下来,回家以后成为对社会更加有益的公民,比如创建了无数的慈善机构,或者诸如此类的。

耶鲁公开课 - 公正课程节选

In effect,they become lobbyists.

VOA: special.2010.09.27

Here's the line that Homer writes, they live without the Greek word is nomoi, which we would translate as laws, but before they become laws they are the customary norms of society, in other words, civilization.

荷马有如下描写,他们的的生活脱离于nomoi,我们可以将其翻译为法律,但是在这些成为法律之前,它们是社会约定俗成的标准,换言之,就是文明

耶鲁公开课 - 古希腊历史简介课程节选

"When they become infected with the al-Qaida bug, their idea of who they should target as an enemy changes."

VOA: standard.2010.05.18

Things can't become holy and can't come into contact with the holy or the sacred if they are not first pure.

事物不可能变得神圣或是与神圣有联系,如果它们连纯洁都算不上。

耶鲁公开课 - 旧约导论课程节选

(SAYING) Dr.Wafaa El-Sadr from Columbia University in New York says doctors want to reach people with HIV before they become visibly ill, especially pregnant women.

VOA: standard.2010.07.17

So, in a way, by longing to be where they were when they were children, by longing to inhabit that time, as well, he wants to become them.

所以，他用一种方式去怀念，渴望去这群人还是孩子时，生活过的地方，渴望经历那种时光，也渴望成为他们之一。

耶鲁公开课 - 1945年后的美国小说课程节选

And then as they become toddlers as they started crawling around, they get that lead dust on their hands from the windowsills in the floors, they put it in their mouth."

VOA: standard.2009.12.19

They didn't become a free man, they became a freed man, and that was legally different.

他们不是自由民，他们是自由人，法律上是不同的。

耶鲁公开课 - 新约课程节选

They become uncomfortable with going back sometimes."

VOA: standard.2010.07.01

In times of stress and trauma, they'll become younger, they will act younger.

在他们感到压力和受伤的时候，他们回到更加年幼的阶段，表现出年幼时的行为。

耶鲁公开课 - 心理学导论课程节选

Assistant Director-General for Health Security and Environment at the World Health Organization, Dr.Keiji Fukuda, urged people to practice good hygiene, including washing their hands and covering their mouth when they cough, and if they become sick to stay home.

VOA: standard.2009.04.29

And the interesting point is many people who have this sort of experience, for whom their mortality has become vivid, they often say,I've got to change my life.

而且有趣的是很多拥有这种经验的人，对必死性的了解更为深刻的人，通常会说，我要改变我的生活。

耶鲁公开课 - 死亡课程节选

Sometimes they come from the Caribbean and become Americans.

有时候他们从加勒比来,成为了美国人

耶鲁公开课 - 美国内战与重建课程节选