【机】 原动机
在线英汉词典

prime mover的短语、例句：

prime mover (a) fundamental source of power for providing movement, such as wind or water 原动力（产生动力的力, 如风力或水力）. (b) person who originates a plan, course of action, etc and has it put into practice （计画、 行动等的）发起者, 推动者
He was the prime mover in the revolt against the government. 他是这场反政府叛乱的煽动者.