I guess most people think thirty years is long enough, but that's the way mortgages go ever since.

我猜大多数人都认为30年足够长了,这是抵押贷款的演变过程

耶鲁公开课 - 金融市场课程节选

This process is sublimation, solid to vapor.

从固态到液体的这个过程，叫做长华。

麻省理工公开课 - 固态化学导论课程节选