That means it is easier for planes with only two engines to strike a flock of birds and lose power in both engines.

VOA: special.2009.04.01

We could also figure out the formal charges, and obviously the formal charges between these two atoms, they're going to be identical, we're only dealing with oxygen atoms here.

我们还可以把形式电荷算出来，显然这两个原子的形式电荷，应该是完全相同的，我们要处理的只有氧这一种原子。

麻省理工公开课 - 化学原理课程节选

There are some exceptions, which we'll get to later, but the only a big exception here is with hydrogen, which has a special stability that's associated with two electrons.

但也有一些例外我们将以后再讲，但这里只有一个较大的例外，氢，它的稳定性比较特殊，只需要两个电子。

麻省理工公开课 - 化学原理课程节选

But the work was slow with only two men and not much equipment.

VOA: special.2010.07.10

He only has two to start with and for you, it's how many battalions of his get destroyed?

他只有两个营的兵力,而你的收益是入侵者损失多少兵力

耶鲁公开课 - 博弈论课程节选

And with only two months left and numerous hurdles remaining, questions are being raised about whether nations can narrow their differences in time.

VOA: standard.2009.09.28

Well, one of the things that they do when the Homeric heroes refer to their wives-- there are really only two places that they seem to be associated with.

其中一件荷马史诗的英雄提到的,他们的妻子所做的事--,似乎她们只过着两点一线的生活

耶鲁公开课 - 古希腊历史简介课程节选

They were only two men among more than one hundred who left the ships with huge amounts of money.

VOA: special.2009.02.04

Whatever the n number is, with the exception of helium, helium is the oddity because there's only two elements in n equals one shell.

无论n是多少，除了氦之外，氦是个特例,因为只有两个元素,在n为1的这一层。

麻省理工公开课 - 固态化学导论课程节选

He was sick only two days. They found him the morning of the first day in his room downstairs helpless with pain.

VOA: special.2009.08.01

If you start with only one, you have two pieces of DNA, then you'll get 2 to the Nth fragments after N cycles because each cycle you're doubling the number.

如果你从仅仅一个DNA开始,你有两条DNA链,经过N次循环后,就得到二的N次方个DNA片段,因为每次循环都使其数量翻倍

耶鲁公开课 - 生物医学工程探索课程节选

His love for his young wife could only be the stronger of the two if it could link itself with his love of science.

VOA: special.2009.09.26

A to B is one distance, which is a large one, and B to C is only half that distance, and that's because of the way the Greeks laid this thing out with their two to one ratios, three to two ratios and so on.

到B是一个距离,比较大,而B到C只有半个距离,因为希腊人,用诸如二比一,三比二,之类的频率比来安排音阶

耶鲁公开课 - 聆听音乐课程节选

That is,we can complete two goals with only one effort or action.

VOA: special.2009.07.26

So, essentially we're just breaking it up into two parts that can be separated, and the part that is only dealing with the radius, so it's only a function of the radius of the electron from the nucleus.

所以本质上我们把它写成,两个可分离的部分，这部分，只与半径有关，它仅仅是，电子,到核子距离的函数。

麻省理工公开课 - 化学原理课程节选

That cabin is a 14-ton spherical steel capsule only two meters in diameter, with a single,half-meter-wide circular plastic window for viewing.

VOA: standard.2010.06.21

So even though there's only two firms here, with price competition, identical products, we end up with an outcome that looks exactly like perfect competition, except for the fact there's only two firms.

尽管这里只有两家公司,进行某种产品的价格竞争,我们得到了,和完全竞争非常相似的结果,除了只有两家公司这个事实

耶鲁公开课 - 博弈论课程节选

North and South Korea remain technically at war with each other, with only a 1953 armistice having paused fighting between the two sides.

VOA: standard.2009.09.09

But the results were closer than predicted, with only a five percent difference between the two men.

VOA: standard.2010.07.03

U.S.funding for AIDS programs has stayed the same, with only a slight increase of two percent.

VOA: standard.2010.07.17

In the public health care system, for example, only two hospitals are equipped with dialysis machines, which remove impurities from the blood when the kidneys can not do it.

VOA: standard.2010.05.30