Locknut
n. 防松螺母
🗣️ 情景例句
I'm very sorry.
非常抱歉。
Laugh before breakfast you'll cry before supper.
乐极生悲。
We offered them food and spoke to them kindly, but they remained motionless.
我们给他们东西吃，客客气气地同他们交谈，但他们却一动也不动。