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今天我们要学的词是 renewable. Renewable 形容词，意思是可再生的，可更新的。President Obama is ordering federal agencies to get 20 percent of their electricity from renewable sources by 2020. 美国总统奥巴马要求政府机构在2020年前，让本部门用电的百分之二十来自于可再生能源。The renewable energy order is one of several steps the administration has recently announced to increase energy efficiency. 美国政府最近就提高能源效率宣布了几项计划，这项有关可再生能源使用的命令是其中之一。好的，今天我们学习的词是 renewable, renewable, renewable...
