英語短語：Put your thinking cap on 認真思考，開動腦筋

如果你 “put your thinking cap on（戴上你的思考帽子）”，那么你就在 “認真思考某件事情”。在遇到一個需要通過深思熟慮去解決的難題時，就可以使用這個表達。

例句
This exam will be difficult. However, if you put your thinking cap on, you'll be fine.
這場考試會很難。不過，只要你認真思考作答，就沒問題。

I didn't know how to work out the math problem at first, but I put my thinking cap on and found the answer.
我起初不知道該怎樣解答這道數學題，但在仔細思考之后，我找到了答案。

We'll need to put our thinking caps on to solve this riddle.
我們需要開動腦筋，才能解開這個謎語。