因为数据传送到另一个节点只需很短的距离，该网络需要的能量就更少。
It needs less power because the data travel only a small distance to another node.
在某些地方，节点有很多与他们邻居的联系，但是网络同时也包含了随机性，而且经常在两个节点间有长距离的连接。
In places, the nodes have many connections with their neighbours, but the network also contains random and often long links between nodes that are very far away from one another.
两个节点间的逻辑距离，即一个跃距为从一个节点到邻近一个节点的距离。
The logical distance between two nodes. One hop is the distance from one node to an adjacent node.
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