Translation of "power source" into Chinese

IEDs generally consist of a switch, power source, initiator, container and explosives.

简易爆炸装置一般都由一个开关、电源、启动装置、容器和爆炸物组成。

Humanity has harnessed powerful sources of energy but is powerless against the forces of nature.

人类开发利用了强大的能源,但在自然力量面前却束手无策。