4) There was a rap at/on the door.
有敲门声.
5) a brick picked up to knock on the door and thrown away when it has served its purpose; a stepping-stone to success
敲门砖
6) I knock on the door.
我敲门。
补充资料:敲门
1.叩门。 2.古代婚仪中的纳采。
说明:补充资料仅用于学习参考,请勿用于其它任何用途。
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