Will you duck down  please?
 →  머리좀 숙여 주세요.

[예문]
A:Excuse me, Will you duck down a little please?
  죄송한데 자세좀 낮춰주세요.

B:Pardon?
  뭐라고요?

A:Will you duck down please? I can't see it.
  자세좀 낮춰주세요. 안보여요.

B:Oh,I am sorry. I didn't know that.
  아, 미안해요.몰랐습니다.