grindstone
n
1 stone shaped like a wheel, turned on an axle, against which one holds knives or other tools to sharpen them 砂轮.
2 (idm 习语) keep one's/sb's nose to the grindstone => nose1.
🗣️ 情景例句
From childhood.
在我小的时候。
You won't regret it.
你不会后悔的。
If one law is changed, then people will later want to change other laws.