knife edge
noun uk/ˈnaɪf ˌedʒ/ us/ˈnaɪf ˌedʒ/
on a knife edge 处于摇摆不定的处境；处于令人焦虑的状态；结果未明
in a difficult or worrying situation of which the result is very uncertain
At the moment the election seems balanced on a knife edge. 此刻看起来，选举尚未定局。
江苏热线英汉汉英双解词典包含207361条英汉翻译词条，涵盖了常用英语单词及词组短语的翻译及用法，是英语学习的必备工具。