Lighting accounts for about 7% of the total electricity consumed in the US. Since lighting is often far removed from the power source—such as the distance from a power plant to street lamps on a remote highway—a lot of energy is lost during transmission.

在美国，照明约占总耗电量的7%。由于照明通常远离电源——例如从发电厂到偏远公路上的路灯——因此大量的能源在传输过程中会损失掉。

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Disconnect the power source from the computer before opening the back.

打开计算机的后部之前先切断它的电源。

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First you have to unplug the monitor from the power source and from the computer.

首先，你得把显示器和电源及电脑相分离。

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"The power source for the aircraft are the two battery packs you see on either side, which are lithium ion batteries which are similar to what you find in our laptops, only custom made for us for this application."

VOA: standard.2010.08.11

Similarly, divination. Divination is an attempt to discern the future that, once again, heads right to the source of power.

类似的还有占卜术，占卜是一种试图看清未来的法术,它的终极目标，也是神力的源头。

耶鲁公开课 - 旧约导论课程节选

They emerge from this indifferent primal realm, This mixture of salt and sea waters, that is the source of all being and the source of ultimate power, But they age and they mature and they fight and they die.

他们都来自没有差别的原始王国，那盐和水的混合体就是一切生物的本源,也是极权的来源，但是他们会成长，成熟，战争，又死去。

耶鲁公开课 - 旧约导论课程节选

Instead of plasmids (the power source in the first two games), so-called vigors are the source of Booker's environmental powers.

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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

Users will experience a redesigned user interface with full user profile control that intelligently detects the power source and GPU, allowing applications to scale seamlessly.

ENGADGET: AMD Radeon HD 8000 series GPUs official for laptops, desktop series now shipping to OEMs