The mainspring of his existence was taken away when she died and with it had gone his bounding assurance, his impudence and his restless vitality.

他的生存的主发条已经在爱伦去世那天被拆掉了，同时消失的还有他那充分的自信，他的鲁莽和无穷的活力。

But acquisitiveness, although it is the mainspring of the capitalist system, is by no means the most powerful of the motives that survive the conquest of hunger.

虽然占有欲是资本主义制度的主要动力，但它决不是征服了饥饿以后最强大动机。

Toby Tullis had wanted to know what made Leslie Searle tick; and Grant, too, lying with his eyes on the ceiling, unmoving for an hour at a time, was looking for the mainspring of Leslie Searle's mind.

Toby Tullis 想知道是什么让 Leslie Searle 兴奋起来；格兰特也一样，眼睛盯着天花板，一动不动地躺了一个小时，正在寻找莱斯利·塞尔思想的主要动力。