fateful; life-and-death; mortal; of vital importance; vital (ly) ❍ 特命你今夜十一时，按原订计划行动，～，勿误。(黎汝清《海岛女民兵》276) I order you to take action as pre arranged. Time: 23:00 hours tonight. Your obe dience is a life-and-death matter.
生死攸关shēnɡ sǐ yōu ɡuān
攸：所。比喻事态严重；也形容关系到别人的生死存亡问题。a matter of life and health, of vital importance, at stake