use your head
US /juːz jʊər hɛd/
UK /juːz jʊər hɛd/
1.
動腦筋, 開動腦筋
to think carefully and intelligently about something, especially to solve a problem
:
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Come on, use your head! There must be a simpler way to do this.
快，動動腦筋！肯定有更簡單的方法來做這件事。
•
If you would just use your head, you'd realize the answer is obvious.
如果你動動腦筋，你就會發現答案是顯而易見的。