knockv.敲击；互撞；攻击n.敲；敲门；敲打knock drill扣球练习knocking on手球knock roundv.忙乱knock limit爆燃极限knock-outn.清箱knock sb up把某人叫醒, 使某人疲倦, 把某人肚子搞大, 临时拼凑knock about粗暴地对待； 到处游荡； 碰撞knock burst岩石突出knock undervt.屈服knock-pinn.顶出杆

1. He knocked at the door and entered.
   他敲了敲门便走进去了。
2. She is pecking away at the keys of a typewriter.
   她不停地敲打着打字机的键。