life-and-death
adj.（形容词）
Involving or ending in life or death:
生死攸关的：涉及生死的或以生死终结的：
例句：
a mongoose in a life-and-death battle with a cobra.
与眼镜蛇进行生死攸关搏斗的獴
Vitally important:
至关重要的：
例句：
a life-and-death struggle between union and management.
工会与资方的至关重要的斗争
