词典释义：
v. 旋松卸下；把…旋开；拆卸；打开、拧松；（unscrew的第三人称单数）
The base of the lamp unscrews for wiring and mounting.
台灯的底座可以拧开来进行布线和安装。
The force of the explosion enlarges the female (outer) thread enough that the threaded connection unscrews instantly.
爆炸所产生的力使母扣扩大，足以使丝扣连接处瞬时松开。
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