a necessary evil

释义

1. 无法避免的坏事；不得已的事

   a thing that is bad or that you do not like but which you must accept for a particular reason

电影里这样说 · 3 部

• l'm necessary evil.The Dark Knight Rises2012
• Necessary evils for the greater good.The Best of Enemies2019
• ...unless you are prepared to do what is necessary to defeat evil.Batman Begins2005