knife-edge
['naɪf.edʒ] noun
on a knife-edge
■in a difficult or worrying situation of which the result is very uncertain 处于摇摆不定的处境；处于令人焦虑的状态；结果未明•At the moment the election seems balanced on a knife-edge.此刻看起来，选举尚未定局。
['naɪf.edʒ] adjective [before noun]
SHARP 锋利的
■narrow and sharp 锋利的•We had to climb over a knife-edge mountain ridge.我们不得不翻越一道陡峭的山脊。
['naɪf.edʒ] adjective [before noun]
UNCERTAIN 不确定
■describes a situation where the result is very uncertain 处于摇摆不定的处境；处于令人焦虑的状态；结果未明•a knife-edge vote结果难料的投票 |