For example, the log buffer writes each transaction to logs and how different log mode can be used to accomplished different modes of backup and recovery.

例如，日志缓冲区将每个事务写到日志，可以使用不同的日志模式来实现不同的备份和恢复模式。

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Discussion: First, in the above two transaction modes, what time or what act signifies the formation of a contract?

上述两种交易模式中，合同在哪个时间段（或行为）成立？

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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。

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