In very severe cases, it can even defile some common objects, and in those cases, the source of impurity might have to be isolated or excluded if necessary.

在一些非常严峻的情况中，它会玷污一些普通的事物，在这种时候，不洁之源,也许只能被孤立，严重的话需要驱逐。

耶鲁公开课 - 旧约导论课程节选

Comes to mind, what happened, even foot-binding, that was something very common practice, basically erased within a generation.

突然想到了缠足这件事，这曾经是很常见的事情，而随着时代的变迁，它也已经淡出历史了。

普林斯顿公开课 - 人性课程节选

I have left out meat and fish, of course, neither of them very common in this part of the world, but meat was common enough, because there were sheep and there were goats, even when beef would have been very hard to get.

当然我没提到肉和鱼,它们在希腊都不是很常见,但相对来说肉类已经相当常见了,因为即使在牛肉都很难搞到的时候,这里还有着绵羊和山羊

耶鲁公开课 - 古希腊历史简介课程节选