功率
功率（英语：Power）定义为能量转换或使用个速率，以单位辰光个能量大小来表示，即是作功个率。功率个国际标准制单位是瓦特（W），名称是得名于十八世纪个蒸汽引擎设计者詹姆斯·瓦特。灯泡拉单位辰光内，电能转换为热能搭光能个量就可以用功率表示，瓦特数越高表示单位辰光用个能力（或电力）越高。
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