当前，军用通信网络化、系统化的要求越来越高，各种设备之间的连接关系日益复杂，而且操作繁琐。
Nowadays, the military communication equipments have been complicatedly & miscellaneously interconnected hard to operate so the demand of network and systematization of military communication.
在读取关系图时，假设有一个令牌或控制线程将连接线从一个操作传递给下一个操作。
To read a diagram, imagine that a token, or thread of control, passes along the connectors from one action to the next.
为了加快查询的执行，我们对存放在关系库中的XML数据建立结构化映射，以减少SQL语句中连接操作的数目。
In order to speed up the query evaluation, we established the structured mapping for the XML data stored in RDB, and therefore, the frequency of join operations in SQL statement can be decreased.
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