绞尽脑汁

cudgel one's brains for; rack one's brains

1. 他绞尽脑汁以寻求答案。
   He puzzled his brains (ie thought hard) to find the answer.
2. 我们为寻找答案而绞尽脑汁。
   We racked our brains for an answer.
3. 即使绞尽脑汁，他还是连一个例子也想不出来。
   Even after racking his brains he couldn't think of a single example.

绞的英语翻译：

尽的英语翻译：

脑的英语翻译：

汁的英语翻译：