"There was checking all around. But somehow, it is not possible to check all vehicles, so they might have slipped a vehicle inside and exploded it."

VOA: standard.2009.09.26

And that's not possible in all parts of the world, not everybody has that opportunity to interact with medical professionals that often.

而这不可能在世界各处都能实现,并不是每个人都经常有机会见到医生的

耶鲁公开课 - 生物医学工程探索课程节选

All heat couldn't get successfully converted into work That would be desirable, but it's not possible.

都变成功,把全部热量变成功是非常令人期待的，但是这是不可能的。

麻省理工公开课 - 热力学与动力学课程节选

This is optimized not for that common case but for all possible cases.

这不是通常情况的最佳化,而是各种可能的情况。

哈佛公开课 - 计算机科学课程节选

That's certainly one way to do it, but for computers that's not necessarily the easiest way. So another way of solving it is to do something we already saw last time, which is basically, why not simply enumerate all possible examples and check them?

将一个等式代入另一个等式，这当然是一种办法,但是对电脑来说这绝对不是一件简单的事,所以解决这个问题的办法，正如我们上一次看过的,非常基本？

麻省理工公开课 - 计算机科学及编程导论课程节选

Poetry is not interested in expert debate at all, and it converts the big spectrum of possible degrees of accent into those two simple categories: stressed and unstressed syllables.

诗是从不在乎这样专业的争议的，它将涵盖很多不同程度的重音的音谱,简单分成两种：,重音和非重音节。

耶鲁公开课 - 现代诗歌课程节选

The regime for him is not one branch of human activity among others it is the fundamental principle or ordering principle that makes all the others even possible.

对他而言,政体并非人类活动的一个分支,而是基本的原则,或说是指导原则,使所有其它学科化作可能,这就是为何。

耶鲁公开课 - 政治哲学导论课程节选

The question when we see exceptions, whether it's the Lykken and Tellegen study, not all twins were the same, the question is no longer whether or not change is possible, but rather how is change possible.

当我们看到了例外，无论是在Lykken和Tellegen的研究，当发现不是所有的双胞胎都一样，已不再是，改变是否有可能，而是怎样实现这种改变。

哈佛公开课 - 幸福课课程节选