Locknut
n. 防松螺母
🗣️ 情景例句
Why is that necessary?
为什么有此必要
No possession, but use, is the only riches.
真正的财富不是占有，而是使用。
Zheng Jie, I would like to support your music school.
郑杰，我愿意资助你办音乐学校。