whetstone

n.

磨石，油石；

复数：whetstones

1. Competition is the whetstone of talent.
   竞争磨炼才能。
2. The finest edge is made with the blunt whetstone.
   最锐利的锋刃是从粗糙的磨刀石上磨出来的。

Precision ceramic whetstone
Composite whetstone for polishing soft metals
A 40-year follow-up of whetstone cutters on silicosis
Intersecting Isograds in the Whetstone Lake Area, Ontario
Amphibians and Reptiles of the Whetstone Mountains, Arizona
Method of manufacturing revolving whetstone and revolving whetstone manufactured by the same
Mortality due to silico-tuberculosis and lung cancer among 200 whetstone cutters.
Redescription of Early Pennsylvanian Trace-Fossil Holotypes from the Nonmarine Hindostan Whetstone Beds of Indiana
Dom's Brush with Bin Laden; Heard the One about the Comedian and the Terrorist? DAVID WHETSTONE on Dom Joly's Colourful Career
A Middle Pennsylvanian (Bolsovian) peat-forming forest preserved in situ in volcanic ash of the Whetstone Horizon in the Radnice Bas...