一髮千鈞 [－发－钧]

Jyutping jat1 faat3 cin1 gwan1
Pinyin yī fǎ qiān jūn

Definitions (Wiktionary)
  1. phrase, idiomatic
    Synonym of 千鈞一髮／千钧一发 (qiānjūnyīfà, “imminent peril; a matter of life or death”).
    (syn.) 千钧一发, 千鈞一髮

一髮千鈞 [－发－钧]

Jyutping jat1 faat3 cin1 gwan1
Pinyin yī fà qiān jūn

Definitions (CC-CANTO)
  1. thousand unit of weight is hang on to one single hair, which describes the situation is very dangerous
Definitions (Wiktionary)
  1. phrase, idiomatic
    Synonym of 千鈞一髮／千钧一发 (qiānjūnyīfà, “imminent peril; a matter of life or death”).
    (syn.) 千钧一发, 千鈞一髮
Definitions (Kaifangcidian)
  1. （沒有對應漢語詞彙）