These new employees are the company's future driving force.
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history
Military term popularized by Mao Zedong's writings on strategy: the goal of combat is to destroy the enemy's 有生力量 (manpower and matériel), not to hold territory. Still used in PLA doctrine and general speech.
usage
Two main senses: (1) military combat strength, (2) any active/productive group ('young people are the 有生力量 of the nation').