擰緊
拼音：níng jǐn英文解釋：
screw down【化】 tightening
相關詞條：
1.screwhome 2.tighten(ing) 3.screwup 4.bolting例句：
- 這個螺栓已經壞了，不能擰緊了，但是我還未買來新的之前暫時再用一下。The bolt is worn and not an exact fit but it will serve its turn until I can buy a new one.
- 他擰緊了螺絲。He tightened the screws up.
- 防松螺母常指擰緊在另一個螺母上的防止其鬆動的細螺母A usually thin nut screwed down on another nut to prevent it from loosening.
- 這螺絲釘需要再擰緊些。This screw needs tightening.