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1·The demands of loss allocation in different transaction modes are analysed. The object of loss allocation is brought forward. The existing loss allocation methods are also summarized.

第二章阐述了输电服务中的网损分摊问题，分析了不同交易模式对网损分摊的要求，并提出了网损分摊的目标，还对已有的网损分摊方法进行了总结。

2·The method of reactant recirculation was adopted to eliminate the water loss by tail gases, the new water management system was brought forward to measure water distribution.

采用反应气循环使用实现生成水零损失，提出新型水管理系统对膜电极两侧水分布进行了研究。