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
Why did you stop working?
你为什么要退休?
What's the weather like today?
今天天气如何?
that I was a new boy in a huge school, and I would have been very pleased to be regarded as something so interesting as a problem.