久青草国产手机视频免费观看_毛片网站是多少_亚洲视频中文_一区二区高清在线

upheaval

英 [?p'hi?v(?)l] 美[?p'hivl]
  • n. 劇變；隆起；舉起

考試真題

Optimists point out that technological upheaval has benefited workers in the past.

出自-2018年考研閱讀原文