He had the rough edges knocked off him at school.
在学校改掉了一些坏毛病。
、窗等）He had the rough edges knocked off him at school.
在学校改掉了一些坏毛病。
It sounds as though there is a knock at the door.
听起来好像有人在敲
。
He went upstairs and knocked at the door.
楼敲。
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