That would be given by a vector field that points toward the origin and whose magnitude is inversely proportional to the square of a distance from the origin.
力场由一个指向原点的向量场给出，并且此向量场的大小，与其到原点的距离的平方成反比。
For the proxy overlay, we choose to distribute and maintain the cost information using the distance vector protocol.
对于代理覆盖，我们选择采用距离向量协议来分发和维护代价信息。
Table. There are two main types of routing protocols: distance vector and link state.
有两个主要的类型的路由协议：距离矢量和链路状态。
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