But if most people who are good borrowers, who know what they're doing, want these, they want a conventional thirty-year mortgage because it will fix a mortgage payment for the rest of the thirty years and you have nothing to worry about.

但是如果大多数人是优质借款人,他们知道自己在做什么,他们会选择普通30年期抵押贷款,因为在剩余的30年时间里,抵押贷款的偿付是固定的,你不需要为它担心

耶鲁公开课 - 金融市场课程节选

but, uh, some days it's more, some days it's less, sometimes I don't study at all.

不过，时间不固定，有时候多，有时候少，有些时候我一天都不学习。

MIT的时尚品味 - SpeakingMax英语口语达人