mainspring in a sentence

Example sentences for mainspring

If you're not looking at the mainspring, you're only operating on the surface.
Preclusive action, not private profit, has been the mainspring of imperialism.
The mechanical timer is a verge type, three-gear timer, powered by a torsional mainspring.
Drugs are a lucrative business and a mainspring of global criminal activity.
Suddenly, the political mainspring of the plan was gone.
But the humor of him who feeds en melancholy is begotten in charity, the mainspring of all genius.

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