名词
中文翻译：千瓦时
同义词：
['kilowatt-hour', 'kilowatt-hour']
例句：
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1.The solar panel generates 50 kilowatt-hours of electricity per day.
太阳能板每天产生50千瓦时的电量。
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2. The energy efficiency of the new refrigerator is much higher than that of the old one.
新型冰箱的能效比旧型高得多。
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3.In order to save energy, we should turn off all electronic devices when not in use.
为了节约能源，不使用时应关闭所有电子设备。