用用你的腦子

To think something through; to be rational and calm.
     Note:
     Use your head和中文所說(shuō)的“用用你的腦子”基本上是一個(gè)意思，表示希望對(duì)方能夠理智冷靜。
     例：Use your head, Jim. You have to pass physics if you want to get your degree.
     吉姆，用用你的腦子吧！如果物理考試不及格是無(wú)法取得學(xué)位的。