Some stress is unavoidable and may even be good for us.

VOA: special.2009.03.24

And I think you will bring trust that there will be good opportunities for us to type.

我想你们会相信,这是一个理解的好机会。

麻省理工公开课 - 媒体、教育、市场课程节选

So, that can be a little bit confusing for us to think about, and when it's a very good question you might, in fact, say well, maybe there's not zero probability here, maybe it's just this teeny, teeny, tiny number, and in fact, sometimes an electron can get through, it's just very low probability so that's why we never really see it.

这想起来有点令人困惑，你们可能会说也许，这里的概率并不是严格的为零，而是非常非常小，所以有时电子就可以穿过去，这是个,很好的想法。

麻省理工公开课 - 化学原理课程节选