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
That'll be our first one,
这将成为我们的第一件,
Nothing is so certain as the unexpected.
天有不测风云,人有旦夕祸福。
The thieves dropped the torch and ran away as quickly as they could.