use your head
US /juːz jʊər hɛd/
UK /juːz jʊər hɛd/
1.
动脑筋, 开动脑筋
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，动动脑筋！肯定有更简单的方法来做这件事。
•
If you would just use your head, you'd realize the answer is obvious.
如果你动动脑筋，你就会发现答案是显而易见的。