Locale: the tag content is written only if the language belongs to the bidirectional languages defined in LocalizerService.properties.

locale：仅仅当语言属于LocalizerService . properties中定义的双向语言时，标签内容才能写入。

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There are also some new key techniques for the system here, such as data model, query language model, routing policy, query processing, optimization strategy, and bidirectional delivery mechanism.

给出了系统中的关键技术，包括数据模型、查询语言模型、路由策略、查询处理及优化策略，以及双向递交机制。

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