The problem has been that high temperatures are necessary to power heat-based conversion systems, yet solar cell efficiency rapidly decreases at higher temperatures.
问题是热能转化系统需要更高的温度，而太阳能电池的效率在高温下迅速降低。
How to get higher incident photon-to-current conversion efficiency and prolong the lifetime of the solar cells has been the focus in the past years.
如何获得更高的光电转换效率，延长整个电池的使用寿命一直是研究的焦点问题。
Specific growth rate (SGR), food conversion efficiency (FCE) was significantly higher for fish meal group, and then the soybean meal group, the potato protein group was the lowest.
试验结果表明，银鲫对三种蛋白源的饲料的摄食率，食物转化效率均有显著差异，以鱼粉组最高，豆粕其次，土豆蛋白最低。
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