the most important part of sth; the most important influence on sth
1.主发条;主要原因,主要动机
1.the most important cause or reason why something happens
1.The mainspring has not always been able to drive the mechanism at its full potential.
主要推动力并不总能尽一切可能地推动该机制发展。
2.His belief in liberty was the mainspring of his fight against slavery.
他对自由的信仰是他反抗奴隶制度的主要动力。
3.Technology was the mainspring of economic growth.
技术是经济发展的主要动力。
4.If we were unable to observe these inequalities, we would have to invent them because they are the mainspring of economic growth.
如果我们不能观察这些不平等，我们必须发明他们，因为他们是经济增长的主要动机。
5.Defeating radical Islam will remain a mainspring of American policy.
打败激进的伊斯兰教徒仍是美国政治上的一个重头戏。
6.Purposiveness cannot, logically, be the mainspring for language development.
目的性在逻辑上不能当成语言发展的主要动力。
7.The first watches appeared shortly after 1500, when the mainspring wAS invented AS a replacement for weights in driving clocks.
在1500年初用发条代替钟锤来驱动时钟发明后不久，就出现了第一批表。
8.The keepers of the mainspring have little faith in it workings.
主要推动力的管理者们对其运转几乎毫无信心。
9.The power for this clock came from a metal coil inside called a mainspring.
钟的动力来源于一个叫做主发条的金属螺旋弹簧。
10.The movements of the wrist make the rotor swing and this winds the mainspring automatically.
腕部的运动使得摆锤摇摆，自动使主发条上紧。