A city electric-power plant affords an illustration of complicated transformations of energy.
A city electric-power plant affords an illustration of complicated transformations of energy.
城市发电厂提供了说明能量转换复杂关系的例子。
A city electric-power plant affords an illustration of complicated transformations of energy.
城市发电厂提供了说明能量转换复杂关系的例子。