vital phenomena

例句：

1. 1. The health of the population is vital to the economy.
   人口健康对经济至关重要。
2. 2. Vital signs are monitored during surgery.
   手术期间监测生命体征。
3. 3. The plant's ability to photosynthesize is vital for survival.
   这种植物进行光合作用的能力对于生存至关重要。