Finally-in this short introduction to XPath, although not in a complete discussion of xpath-you can select nodes based on child elements of the nodes, or on attributes of the node.
最后—对于这里关于XPath的简要介绍而不是详细讨论来说—还可以根据节点的子元素或者节点的属性来选择节点。
In this scheme, the database nodes can be distributed in WAN or LAN and switched transparently to user applications and the system's disaster recovery time is short and the cost is low.
该方案中各节点数据库可以分布于wan或LAN中，对客户应用实现透明切换和数据的自动同步，系统恢复时延很短，开销较小。
Wireless sensor networks consist of a large number of low-power, short-lived, unreliable sensor nodes, one of main goals is to prolong network lifetime.
无线传感器网络是由大量低能量、短寿命、不可靠的传感器结点组成的，延长网络寿命是一个主要的目标。
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