Checknut
防松螺母, 保险螺帽, 锁紧螺母
🗣️ 情景例句
I hope so.
我希望如此。
Learning is better than house and land.
学问是一生的财富。
This is a pity, because noise abatement really is a good cause.and it is likely to be discredited if it gets to be associated with bad science.
要求减少噪音确实是件好事，但是如果与拙劣的科学掺杂在一起的话，就不会被人们所信任，这是很遗憾的。