“绞尽脑汁”用英文怎么翻译啊?

（1） 绞尽脑汁
译文：rack one's brains
其它相关解释:
wrack one's brains
cudgel one's brains for
（2）这道题我绞尽脑汁也想不出来,真难倒我了.
译文：I couldn't work out the problem even after racking my brains,I was really floored by it.
注意：翻译的时候要关注主语的一致性.
另外,再给你几个例子,深入理解一下：
1.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.
2、I believe that you can【work out】 this problem by yourself.
我相信你自己能想出这道题的.
3、我被那个题难倒了.
I 【was floored by 】that question.
4、I 【really】 don't know how to read this word.
我真的不知道这个字怎么念.

1cudgel one's brains for
2rack one's brains

cudgel one's brains for

绞尽脑汁：rack one's brains
例句：
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.
2. 我绞尽脑汁以求找到正确的答案。
I racked my brains to find the correct an...

Rack one's brains.