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
It's our family tree.
这是我们的家谱。
Please come here.
请来这里。
No one can plead ignorance of a subject any longer, for these are countless do-it-yourself publications.