刀锋 (dāo fēng) — knife edge, blade edge

定義

例文

• 刀锋非常锋利，要小心使用。
  dāo fēng Fēi cháng fēng lì, yào xiǎo xīn shǐ yòng.
  The blade edge is very sharp; be careful when using it.
• 他用刀锋轻轻划了一下纸。
  Tā yòng dāo fēng qīng qīng huà le yí xià zhǐ.
  He lightly scratched the paper with the knife edge.
• 刀锋已经钝了，需要磨一下。
  dāo fēng Yǐ jīng dùn le, xū yào mó yí xià.
  The blade edge has become dull and needs sharpening.