lifeblood

名词 lifeblood:

1. the blood considered as the seat of vitality
2. an essential or life-giving force

life.blood

n.（名词）
Blood regarded as essential for life.
生命之血：被看作是生命之所在的血液
An indispensable or vital part:
命根子：不可缺少的或极其重要的部分：
例句：
Capable workers are the lifeblood of the business.
能干的工人是工商企业的生命力