Electric power is carried near a building by the service lines of the electric supply company. often the voltage in the supply lines is higher than the voltage used in the building.

电力由供电公司的输电线路送到建筑物附近。输电线路的电压时常高于建筑物内所用电压。

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Based on the illumination and lifetime characteristics of street lights under different supply voltage, the best voltage supply for high-pressure Sodium lamps used in city street lighting is derived.

根据高压钠灯在不同电压下的照度及寿命特性，推导出路灯半夜灯的最佳供电电压。

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Because the resistance of a digital-potentiometer wiper decreases with increasing supply voltage, you should select a high supply voltage.

因为数字电位器触点电阻随供电电源增长而减少，应该选择高供电电压。

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And these electrodes are then connected to a variable voltage power supply.

这些电极然后,和一个变压电源连接起来了。

麻省理工公开课 - 固态化学导论课程节选

Local controllers (X-NET) gather this information and deliver to a web-controller via GPRS. The overhead sensors are line powered, and the X-NET Controller can be powered by a low voltage supply or a solar panel.

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