razor edge
(亦作razor's edge)
noun
1- a sharp edge of a knife, axe, or similar implement（刀、斧等工具的）锋利的刃。
1.1
- figurative a state of sharp incisiveness〈喻〉敏锐：
he had honed his mind to a razor edge.
他把自己的头脑训练得极为敏锐。
1.2
- figurative a critical or precarious situation〈喻〉危急关头; 紧要关头：
politically we are on a razor edge.
政治上我们正处于紧要关头。
1.3
the razor edge
figurative the most advanced stage in the development of something; the cutting edge〈喻〉事物发展的关键时期; 刀口, 刀刃：in 1960 jet planes were the razor edge of chic.
1960年喷气式飞机颇为流行。
派生词