V-ERG
拧开；旋开
If you unscrew something such as a lid, or if it unscrews, you keep turning it until you can remove it.
例句
She unscrewed the cap of her water bottle and gave him a drink...
她拧开水壶的盖子给他喝水。
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。