It adds the closest routing group to the set of routing groups for which the shortest paths have been determined. 将距离最近的路由组添加到其最短路径已被确定的路由组集合中。
The connection itself is made up of a set of connection objects and a user request that keeps the connection open during the request. 连接本身由一组集合对象和一个在整个请求过程中使连接保持打开的用户请求组成。
