1. energy balance and transformation of general circulation 
   大气环流的能量平衡和转换
2. The study of the flow and transformation of energy. 
   力能学研究能量的流动及转变的学科
3. a transformer whose voltage ratio of transformation can be adjusted. 
   电压比率能够调整的变压器。
4. The ratio of the energy delivered by a machine to the energy supplied for its operation. 
   功率机器做一定功所发出的能量与其总能量的比
5. The ratio of the radiant energy transmitted to the total radiant energy incident on a given body. 
   透射透过特定物体的辐射能量与射入这个物体的总辐射能量之比

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