在战区提供医疗援助是生死攸关的事情。

Providing medical aid in the war zone was ___a ___matter ___of ___life ___and ___death.

医生解释说这次手术事关生死。

The doctor explained that the surgery was ___a ___matter ___of ___life ___and ___death.

对被困的矿工来说，每一分钟都生死攸关。

For the trapped miners, every passing minute was ___a ___matter ___of ___life ___and ___death.