1. I'd like to pick your brain.
我想向你请教下。

2. She was the brains behind this.
这都是她想出的主意。

3. My brain is not working.
我不是很明白。

4. I racked my brain for hours.
我绞尽脑汁想了几个小时。

5. Do you like brain teasers?
你喜欢玩脑筋急转弯吗？