"But the real question though is whether there is enough ambient noise to act as a power source as for a cell phone," said McAlpine.

“但是真正的问题是，是否存在足够强的环境噪音来充当手机的能量源，”麦艾尔·派恩说。

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Owner Christopher Lee realized the system was the answer to his prayers for finding a way to provide his customers with a power source that is accessible and also easy to find.

网吧主人Christopher Lee意识到这个系统为他提供了梦寐以求的解决方案，可为其顾客提供方便接入、容易找到的电源。

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The existing sensors have to be connected to a power source to take readings and transmit them over cell phone towers.

现有的传感器必须接上电源才能读取信息并将它们通过手机发射塔发射出去。

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Using non-performing rubber trees as a source of power also helps rejuvenate rubber production by making room for new planting.

VOA: standard.2009.09.13

The scheme has also attracted interest as a possible long-term power source for a manned mission to Mars.

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Dr Cui hopes in the future only a 9-volt power source will be needed.

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The feature allows a fully depleted battery to be charged to 80 percent capacity in 30 minutes using a 480-volt power source.

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