idiom · to go through fire and water; to risk one's life and limb in the face of extreme danger

战士们在战场上出生入死，最终赢得了战斗的胜利。

idiom · from birth to death; the entire span of a human life from the cradle to the grave

每个人在漫长的出生入死过程中，都会经历各种酸甜苦辣。