tuple set的用法和樣例：
例句
- It adds the closest routing group to the set of routing groups for which the shortest paths have been determined.
將距離最近的路由組添加到其最短路徑已被確定的路由組集合中。 - The connection itself is made up of a set of connection objects and a user request that keeps the connection open during the request.
連接本身由一組集合對象和一個在整個請求過程中使連接保持打開的用戶請求組成。
