1.  blade
2.  cutting edge
3.  knife edge

• 1. 刀刃: Blades | knifeedge | cutting edge | Edge
• 2. 把钱花在刀刃上: spend our money where it counts the most
• 3. 刀刃角: tool point angle | included angle | tool point incline

更多释义

• 1.把这么宽的刀刃磨锋利我做不到。
  It was beyond my ability to grind a blade this broad.
  dict.yoduao.com
• 2.面包刀的刀刃应带有波浪齿。
  Bread knives should have a serrated edge.
  dict.yoduao.com
• 3.锋利的刀刃可能会划破皮肤，引起出血。
  A sharp blade is likely to nick the skin and draw blood.
  dict.yoduao.com

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