Razor-edge

(also razor's edge)

(n.)

sharp line of division

明显的分界线

e.g. a razor-edge of difference between genius and madness

天才和疯狂之截然不同

 (idm.)

on a razor-edge/razor's edge: in a dangerous or critical situation

处于危险的境地；处于紧要关头

e.g. Since he escaped from gaol, Tom has been living on a razor's edge, terrified of recapture.

汤姆越狱后，时时如惊弓之鸟，生怕再次被捕。

Xinyi Transaltion Studio