With the widespread use of map websites and on-line navigation systems, the need for multi-user concurrent queries for travel information is ever-increasing.
随着地图网站和在线导航系统的普及，多用户网络并发出行信息查询服务的需求日益增长。
With the widespread use of map websites and on-line navigation systems, the need for multi-user concurrent queries for travel information is ever-increasing.
随着地图网站和在线导航系统的普及，多用户网络并发出行信息查询服务的需求日益增长。
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