命在旦夕 meaning in English

hold one's life on a precarious tenure; be at death's door; be at the point of death; be dying; be near one's end; be on the verge of death; death is staring somebody in the face.; death may come any minute.; one's hour draws near.; one's life hung in the balance.; one's life is a question of hours.; one's life is in danger.; one's life is nearing its close.; one's life is not worth a day's [an hour's] purchase.; one's life may end at any moment.; one's life seemed on the point of coming to an end