对最简单形式的描述必须包括Web服务描述语言(WSDL)文档，该文档描述了首选信息源和所有备用信息源。
The description for the simplest form must include a Web Services description Language (WSDL) document that describes the preferred source and all alternate sources.
不过，备用服务器信息将仅存储在JDBC驱动程序端的内存中。
However, the alternate server information will only be stored in memory on the JDBC driver side.
活动服务器不向备用服务器传输邮件信息。
The active server does not transfer mail messages to the standby server.
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