不绝如缕[bù jué rú lǚ]
词典\u0064\u0061\u006E\u0063\u0069\u002E\u0039\u0031\u0031\u0063\u0068\u0061\u002E\u0063\u006F\u006D
词典hanging by a thread：不绝如缕。
词典very precarious：不绝如缕。
词典almost extinct：不绝如缕。
词典linger on faintly：不绝如缕。
不绝如缕[bù jué rú lǚ]
（像细线一样连着; 形容局面危急或声音微弱） hanging by a thread; very precarious; almost extinct; linger on faintly; The continuation is only held by a silken thread.