the most important spring in a mechanical device (especially a clock or watch); as it uncoils it drives the mechanism
mainspring例句
The cylinder within the mechanism of a timepiece that contains the mainspring.
发条盒一圆柱形物，内装含有主发条的表的零件
Her jealousy is the mainspring of the novel's plot.
这部小说情节中贯穿了她的忌妒之心。
mainspring详细解释
main.spring n.（名词）The principal spring in a mechanical device, especially a watch or clock, that drives the mechanism by uncoiling.主弹簧：一个机械装置中尤其是手表或钟表通过绕旋反解来驱动机械的弹簧The chief motivating force:主要推动力：例句：the mainspring of a reform movement.改革运动的主要推动力
