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knife-edge

noun
🔊/ˈnaɪf edʒ/
🔊/ˈnaɪf edʒ/
[usually singular]Idioms
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  1. the sharp edge of a knife刀刃
    Oxford Collocations DictionaryKnife-edge is used before these nouns:
    • vote
    See full entry
Idioms
on a knife-edge
  1. (of a situation, etc.形势等) in a difficult or dangerous situation in which a very small change can cause somebody/something to succeed or fail 胜负难料；成败未定
    • The economy is balanced on a knife-edge.经济形势尚不明朗。🔊🔊
    Topics Successc2, Difficulty and failurec2
  2. (of a person人) very worried or anxious about the result of something十分焦虑；急于知道结果
    • He’s living on a knife-edge, waiting for the test results.他生活在刀刃上，等待测试结果。