| 单词 | knock² |
| 释义 | knock²n [c] 1. the sound of someone or something hitting a hard surface 敲击声:◇there was a loud knock at the door. 传来一下很响的敲门声。 2. when something hits something else, especially in a way that causes damage or injury ［尤指造成损毁或损伤的］敲击; 撞击:◇a knock on the head 头上被撞了一下 |
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