DRBD软件为用户读写操作提供主服务器和辅助服务器之间的同步操作，以及其他同步操。

The DRBD software provides synchronization between the primary and secondary servers for user-based Read and Write operations as well as other synchronization operations.

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在XSD SDO Transform特性中提供的ObjectUtil辅助类，包含合计和其他工具api，来操作sdo对象。

The ObjectUtil helper class, provided with the XSD SDO Transform feature, contains aggregate and other utility APIs that operate generically on the SDO objects.

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而声频分析可以在不适合其他诊断方法的情况下作为辅助手段，而且操作简便，设备便宜。

And audio analysis is suitable methods for the condition which is difficult for other diagnostic, and it is simple and cheap.

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