[ zhāobùbǎoxì ] hang by a thread; anything may happen any time.; be not worth a day's purchase; be in a precarious state -- in imminent danger of death; cannot keep the wolf from the door; live in constant fear for one's livelihood; live from hand to mouth; not to know at dawn what may happen by dusk; not to know in the morning what may happen in the evening; may collapse any day; may fall any moment 短语和例子 过着朝不保夕的生活 make a precarious living; 病人已朝不保夕。 the patient's condition is critical