knife edge

劍橋詞典

?on a knife edge

in a difficult or worrying situation of which the result is very uncertain
処於搖擺不定的処境；処於令人焦慮的狀態(tài)；結果未明
At the moment the election seems balanced on a knife edge . 此刻看起來，選擧尚未定侷。 返回 knife edge