打磨石的英文：
whetstone
n. 磨石
The finest edge is made with the blunt whetstone. ——Gohn Lyly
最锐利的锋刃是从粗糙的磨刀石上磨出来的。——黎利
a grindstone; a whetstone; a sharpening stone; a knife grinder; a knife sharpener; a hone
磨刀石
A fine - grained whetstone for giving a keen edge to a cutting tool.
细磨刀石纹理细密的磨刀，可使切削工具刀刃锋利
A very hard,dense,even - textured,silica - bearing sedimentary rock used in whetstones.
均密石英岩非常坚硬，致密，结构均匀，含硅的沉积岩，用作磨石