But it means that we get ill less often and when we do get sick, we recover more promptly.

但这意味着我们不会常生病，就算病了，也能恢复得更快。

哈佛公开课 - 幸福课课程节选

We'll talk more about this later, but it often happens that when you change your program to solve one problem you break it, and things that used to work don't work.

我们以后会更多的去讨论者一点，但是经常发生的情况是当你因为,一个问题修改你的程序的时候,你修改了程序,但原来没问题的模块。

麻省理工公开课 - 计算机科学及编程导论课程节选

So while the relationship of D to some of the laws in the Covenant Code is often--not always but often--one of revision, the relationship between D and the laws in the Priestly source is more difficult to characterize.

那么，尽管申命记材料和契约法典中的律法的关系,往往是，不是总是而是往往，是修订，申命记材料中的,律法和祭祀派材料的的关系则更难定义。

耶鲁公开课 - 旧约导论课程节选

This is so obvious in this problem, but when you see more complicated formula, you may not know all the assumptions that went into the derivation and quite often you will be using it when you shouldn't.

在这道题中这些都很明显,但是当我们用更复杂的公式时,你可能搞不清楚所有,在推导时的前提,因此很多时候,你都会用错公式

耶鲁公开课 - 基础物理课程节选