By increasing or lessening the hours of darkness in each day, the scientists have been able to turn plant growth off and on like an electric switch.

用增加和减少每天黑暗小时数的方法，科学家已经能够控制植物生长，如同控制一个电器开关。

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The electric switch machine is an essential part of the railway signal system and plays an important role in guaranteeing the safety of the trains and promoting the transportation efficiency.

电动转辙机是铁路信号系统的关键设备，对保障行车安全、提高运输效率具有极其重要的作用。

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Electrical contact also called contact or contact junction, is the contact component of electric switch, instruments and meters and so on, which takes on the task of current on or off.

电触头亦称触点或接点，是电器开关、仪器仪表等的接触元件，担负着通断电流的任务。

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Five years ago, dairy farmer Darryl Vander Haak flipped the switch on the first electric generator in Washington State powered by manure.

VOA: standard.2010.02.23

If he needed a surge of strength, he imagined throwing an electric switch to flood his muscles with power.

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When you slip the stubby gear selector (an electric switch, actually), you can hear and feel satisfying mechanical clunks and shudders coming from the six-speed, dual-clutch transaxle, signaling that the fuse is lit.

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On the other hand, this conflation makes far more sense in the long term, as our electrical grid becomes more sophisticated, and as electric vehicles begin the inevitable switch from internal combustion engines to electric motors or some other renewable source of power.

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