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
And have a nice afternoon.
祝下午玩得愉快。
I don't care!
我不管!
The weather was very cold, and many people were ill.