在本例中，我们将介绍显示数据中心电源使用效率(PUE)的小部件。
In this example, we will be describing a widget that shows the power usage effectiveness (PUE) of a data center.
LED的使用寿命及电源转换效率成为设计LED照明系统时的主要考虑因素。
Therefore, the life time of LEDs and power efficiency become important issues for LED lighting.
开关电源不断的小型化、轻量化和高效率，在电子设备中使用量越来越大，普及率越来越高。
Switching power supply is more widely used to electronic equipment with its miniaturization, lightness and high efficiency.
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