He went upstairs and knocked at the door.
他上楼敲门。
词条纠错
X
knock at
生词本：
添加笔记：
敲（门、窗等）
He had the rough edges knocked off him at school.
他在学校
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。
声明：
上例句、词性
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相似单词
knobs, knobstick, knobstone, knock, knock against, knock at, knock back, knock down, knock off, knock out,
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