He had the rough edges knocked off him at school.
他在学校改掉了一些坏毛病。
He had the rough edges knocked off him at school.
他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门。
He went upstairs and knocked at the door.
他上楼敲门。
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