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现在关于能源的名词越来越多,越来越复杂,而且互相包涵,定义很不清楚。常常碰到的能源名词不下十几个,如一次能源、二次能源、可再生能源、非可再生能源、
The definition of energy is now more and more complex, more complicated, and it is not clear what the definition is. Often encountered more than a dozen energy terms, such as primary energy, secondary energy, renewable energy, non-renewable energy,