But solar energy photovoltaic power cost is high and its conversion efficiency is low.
但太阳能光伏发电存在成本较高和能量转化效率较低的问题。
What is the definition of "Efficiency of a power conversion system"? How to measure?
请问电源转换系统效率的定义，怎样去测量？
The wind power generation device has simple structure and high energy conversion efficiency.
其结构构成简单，能源转化效率高。
The wind power generation device has simple structure and high energy conversion efficiency.
其结构构成简单，能源转化效率高。
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