Some cesareans are medically necessary. But in other cases, women just want the convenience of knowing when they will give birth.

VOA: standard.2010.06.30

Well, I think that if the great majority of people try to derive maximum utility out of a service, like using cell phones and the convenience that cell phones provide, that sacrifice is necessary for satisfaction to occur.

我觉得如果绝大多数人想要,从某项服务中获得最大功利，比如使用手机，享受手机所带来的便利，那么为了满足需求，这种牺牲就是必要的。

耶鲁公开课 - 公正课程节选

So er is a new entity I've introduced for convenience.

因此,er 是为了方便而引入的

耶鲁公开课 - 基础物理课程节选

Consumers like cloud computing because of the convenience and fun of getting email and social network information anywhere.

VOA: standard.2010.06.22

"It might be privacy, it might be personal liberty, it might be the convenience of the traveling public.

VOA: standard.2010.01.19

"As the supply increases, we do think that access and convenience and ease of getting vaccinated will improve,"

VOA: standard.2009.12.25