Light emitting polymers emit colours when connected to an electric power source.

发光聚合物与电源相连时能发出彩光。

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The output part of the electronic circuit controls a main electric power source, an acoustic horn loop and a brake system.

电子线路输出部分控制车辆的用电总电源、喇叭回路及刹车系统。

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Aircraft electric power source system (AEPSS) is an important part of aircraft equipment. AEPSS includes AC-AEPSS and DC-AEPSS.

飞机电源系统是飞机机载设备的重要组成部分之一，包括交流电源系统和直流电源系统。

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In this case, however, the front electric motor-which is now supplied with energy by the TDI engine-operates exclusively as a generator and a power source for the electric motor at the rear.

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Driving those market valuations is the expectation of more growth ahead: Analysts both in industry and in the government anticipate that solar will be the fastest-growing alternative source of electric power over the next 25 years.

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Crews have been working for a long time on the electric lines above the tracks, the power source for the trains.

WSJ: Probe begins after Conn. commuter trains crash