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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A two-judge panel of a federal appeals court has ruled that big power companies can be sued by states and land trusts for emitting carbon dioxide.

一个由两名法官组成的联邦上诉法院的专门小组，裁定国内最大的电厂可能因为排放二氧化碳被国家和土地信托部门控告。

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The effects of DBR reflectivity and well Numbers on threshold current and output power of bottom-emitting VCSELs were analyzed to design an optimal device structure.

分析了腔镜反射率、量子阱数等参数对阈值电流、输出光功率的影响，并根据理论计算对器件参数进行了优化设计。

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For we would all look up, say yes, those costs are higher than the benefits and move to non-CO2 emitting methods of power generation and transport.

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Analysts say that in order to meet the 2030 target - which Mr Cameron said he "basically endorsed" last year - only about 10% of UK electricity can come from gas-fired power stations emitting at current levels.

BBC: Science & Environment

But high-power light-emitting diodes (LEDs) promise a brighter future in outdoor illumination.

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