for the life of me
无论花多大的力气也无法做某事
口语·强调无法做到某事
英文释义
despite one's best efforts or attempts; even if one tried very hard
例句
I can't remember her name for the life of me.
典故来源
源自18世纪英语，'life'强调竭尽全力，常用于否定句，表示无论如何也无法做到。