基本解释n.剃刀锋口；尖锐的山脊；紧急关头；鲜明的分界限同根派生 英汉例句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。