Air pollution in Beijing reached a high level of 99 on the Air pollution Index on Friday as a sandstorm from the northwest shrouded the capital in dust, the China News Service reported.
据中国新闻社报道，北京市区13日遭遇了来自西北方的沙尘袭击，当天该市污染指数一度达到99。
At present the index that used in evaluating transit network service level is normal performance index usually, it already can't satisfy the request of planning and management.
目前用于评价公交网络服务水平的指标多为常态性能指标，己经难以满足规划和管理的要求。
Multiple index server architecture provides global service routing, and maintains the usability of the low level information server.
多索引服务器结构提供全局的服务路由，同时维持下级注册服务的可用性。
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