razor-sharp

• 1.  

  ADJ（形容词） A cutting tool that is razor-sharp is extremely sharp. 极其锋利的 [usu ADJ n]

  例：

  ...a razor-sharp butcher's knife.

  ...一把极其锋利的屠刀。

• 2.  

  ADJ（形容词） If you describe someone or someone's mind as razor-sharp, you mean that they have a very accurate and clear understanding of things. (思维)敏捷的

  例：

  ...his razor-sharp intelligence.

  ...他敏捷的才智。