用Duck!表达“低头！”

让某人duck 的意思是让此人把头低下或弯下腰来躲避某物的碰击。

• As I walked in the door someone shouted “Duck!” But it was too late and I hit my head.
• The batsman shouted “Duck!” as he hit the ball right at where the spectators were standing.

值得注意的是，短语duck out的意思是逃避、躲开做某事。

• Sorry, I‘ve got to duck out of this meeting, I‘ve got too many other things to do.