racked my brains

racked my brains 基本解释

绞尽脑汁（非正式）

racked my brains 用法和例句

1、I racked my brains to find the answer.

我为找到此答案而绞尽脑汁。

2、I can't work out a solution even though I've racked my brains.

我绞尽脑汁也想不出好的方案。

重点词汇

racked v. 使痛苦, 使焦虑, 绞尽脑汁( rack的过去式和过去分词 )

brains n. 智力, 脑髓 [法] 智能, 智囊