This paper discusses the integrated PWM controller for the direct current governor system, and studies the system construction and the working mechanism.

本文论述了应用集成PWM控制器的直流调速系统，并对该系统结构和工作原理进行了分析和研究。

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There is no mechanism for dismissing a governor-general, other than the prime minister asking the queen to do so.

ECONOMIST: Respect for the office has crashed

Meanwhile, Governor Romney once supported a cap-and-trade mechanism to control carbon emissions but as the 2008 presidential race neared, he backed off and favored modest penalties for coal-fired power plants.

FORBES: Obama and Romney: Energizing Their Bases by Muddying Coal and Wind

In Illinois they voted for a mechanism to recall governors, no doubt with their recent and ethically compromised governor Rod Blagojevich in mind.

ECONOMIST: Ballot initiatives