Using this system, preferential treatment's given to 'premium' visitors.
高级访问者们使用该系统会获得优惠待遇。
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There also is an another Multimedia package which upgrades the S60 with a rearview camera, navigation system offering real-time traffic updates and a 12-speaker premium sound system.
However, to reduce traffic on their system, and to provide a differentiator for their premium customers, Pachube implements multiple levels of throttling for their clients.