whetstone [ˈwetstoʊn]

例句:

• Sharpening the curved blade with professional sweeps of the whetstone.
  来自A. Higgins
• The finest edge is made with the blunt whetstone.
  最好(锋利的)刀口是由钝的磨刀石磨成的.
  
• A fine - grained whetstone for giving a keen edge a cutting tool.
  人能用青铜做成一种刃口锋利的切削工具.
  
• With justice as its whetstone, the multiverse shall achieve perfection.
  以正义为其磨刀石, 多宇宙将可到达完美的地步.
  
• But the whetstone was quite real, it's in the record books now.
  来自THETIMES
• Steve barked a frantic, nearly hysterical call, working the tongue rapidly, like honing a knife against a whetstone.
  来自NEWYORKER