He's not against the radio telescope surveys that have been the mainstay of SETI for the past 50 years, but he says maybe we're looking for the wrong thing.

VOA: standard.2010.04.16

This is a mainstay of some slapstick humor including the classic movie, All of Me.

这是滑稽戏剧的一贯伎俩,同样也出现在经典电影《衰鬼上错身》中

耶鲁公开课 - 心理学导论课程节选

They are all, you know, very popular. All the mainstay ones.

它们全都非常出名，都是电影业的支柱。

廉价看音乐剧的方法 - SpeakingMax英语口语达人