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
Do you mind if I smoke?
我抽烟你介意吗?
Big mouthfuls ofter choke.
贪多嚼不烂。
On motorways you can, at least, travel fairly safely at high speeds,