So let's go to some actual real examples, which might come more in handy for this class.

下面让我们来看一些正确应用它的例子，这些例子在这个课堂上应该更容易一些。

麻省理工公开课 - 化学原理课程节选

Some of you are probably going to be doctors and you don't know why I'm going to do special relativity or quantum mechanics, but you don't know when it will come in handy.

你们中的有些人可能会成为医生,但你们现在不能理解,我为什么要讲相对论和量子力学,但是说不定什么时候,你就用上了呢

耶鲁公开课 - 基础物理课程节选