whetstone
n. 磨石,油石
A whetstone is a stone which is used for sharpening knives or other tools that have a blade.
1. a flat stone for sharpening edged tools or knives
The finest edge is made with the blunt whetstone.
最好(鋒利的)刀口是由鈍的磨刀石磨成的.
A fine - grained whetstone for giving a keen edge a cutting tool.
人能用青銅做成一種刃口鋒利的切削工具.
Competition is the whetstone of talent.
競爭磨鍊才能.
With justice as its whetstone, the multiverse shall achieve perfection.
以正義為其磨刀石, 多宇宙將可到達完美的地步.
Emulation is the whetstone of wits.
競賽是智力的磨刀石.