能源,就是为人类的生产和生活提供各种能量和动力的物质资源,它是国民经济的重要物质基础。从不同的角度,可以对能源进行不同的分类。一次能源和二次能源自然界中本来就有的各种形式的能源称为一次能源。一次能源可按其来源的不同划分为来自地球以外的、地球内部的、地球与其他 Energy is the material resource that provides all kinds of energy and motivation for the production and life of mankind. It is an important material basis for the national economy. From different perspectives, energy can be classified differently. Primary and Secondary Energy All forms of energy inherently found in nature are called primary energy. Primary energy sources can be divided according to their sources from outside the Earth, the Earth’s interior, Earth and other