常見例句When I fell I got a terrible knock on the head. 我摔倒時頭撞得很厲害。Jim sat up when he heard the knock on his bedroom door. 吉姆聽到敲寢室門的聲音時便坐了起來。Knock on the door before you enter. 進屋之前要先敲門。I heard footsteps, then a knock on the door. 我聽到腳步聲，隨后是敲門的聲音。When I fall I get a terrible knock on the head. 我摔倒時頭撞得很厲害。He got a nasty knock on the head when he fell. 他跌倒時頭撞得很厲害。 返回 knock-on effect