Sometimes I can do two things by performing only one action.

VOA: special.2010.06.13

And yet if a computer can only count up to 2 billion or maybe 4 billion, I mean, what do you then do?

如果一台计算机只能够支持20亿,或者40亿，那我们该怎么办？

哈佛公开课 - 计算机科学课程节选

Then later on, if I wish, I can establish a canon by saying certain texts have certain significance and those are the texts that I care about and want to read, but I can only do that if I can distinguish between meaning and significance.

而后来，如果我希望，我可以通过说什么来树立一个标准,比如说，一些作品有固定意义,因此我只关心只想读那些作品，但是我只有,能够分清意思和意义之后，才能那样做。

耶鲁公开课 - 文学理论导论课程节选

You can only do this because it's reversible. What else do I know?

这一步,只对可逆过程成立，还有什么已知条件？

麻省理工公开课 - 热力学与动力学课程节选