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Technological innovations have unleashed the power of renewables such as wind, hydro, solar, and geothermal ( ' , 地热).
出自-2017年6月阅读原文
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Some coal power plants in the United States have operated for more than 70 years! The oldest continuously operated commercial hydro-electric plant in the United States is on New York's Hudson River, and it went into commercial service in 1898.
出自-2015年12月阅读原文
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Technological innovations have unleashed the power of renewables such as wind, hydro, solar, and geothermal (地热).
2017年6月六级真题（第一套）阅读 Section B