环保和洁净能源(Green and clean energy sources) - 50 sec 环保和洁净能源(Green and clean energy sources) Be Veg.
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天然气是一种洁净的能源,在国家环保安全和能源保障方面具有重要意义。
Natural gas is a kind of clean energy source and is important in the security of national environmental protection and energy source.
说明了煤炭在我国能源中的地位及型煤是我国洁净煤中的首选技术,其可带来巨大的环保和经济效益;
The article expounds the coal occupies important status in our country's power and the type-coal is the first technology of clean coal.
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