This would be enough to power an electronic speaker or small LED (light-emitting diode) lights, but not enough to operate a laptop, which requires an estimated 30 to 50 watts.

这对于电子扬声器或小型LED灯已经足够，但还不足以支持笔记本运行。笔记本一般需要30到50瓦的功率。

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For example, the electrical characteristics of the power cable are significantly different from those of the speaker cable.

比如，供电电缆的电气特征和扬声器电缆明显不同。

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Have a ha-ha bulletin board where you only post funny sayings or signs, suggests Allen Klein, an award-winning professional speaker and author of The Healing Power of Humor.

做一个哈哈记事板，上面只贴有趣的俗语或谚语，艾伦·克莱恩说，他是一位获奖职业演说家，幽默的愈合力量一书的作者。

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Diodes are essential in radios to turn rapidly oscillating radio waves into a smoother direct-current signal that can power a speaker.

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In fact, you might argue that, in his polite way, Obama gave too much power to House Speaker Nancy Pelosi at the outset -- allowing eight years of pent-up Democratic demand for spending to show up (in one way or another) in this stimulus bill.

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Essentially a dock designed for your car, the device adds power, a bigger speaker and a better GPS chip.

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