使用手机数据可以帮助锁定广告和对本地服务进行等级划分。
Mining cell phone data could help target ads and rank local services.
目前，Lemon提供免费服务以及两个等级的付费使用服务。
Currently, Lemon offers a free service as well as two levels of paid subscriptions.
支持在OCCI上使用OVF准备服务的服务供应商需要注意满足这些等级要求。
Service providers supporting service provisioning using OVF over OCCI need to take care that these levels are met.
StackExchange团队对性能问题非常关注——比方说，你可以看到StackOverflow在三个不同的等级上 使用caching，从而提升反应时间，减少服务器的负载。
The StackExchange team takes performance very seriously – for instance you can see how StackOverflow uses caching at three different levels to improve response times and reduce server loads.
整合服务数位网路在数位线路上被使用就如同在声音等级的线路上。
ISDN is used on digital lines as well as on voice-grade lines.
整合服务数位网路在数位线路上被使用就如同在声音等级的线路上。
ISDN is used on digital lines as well as on voice-grade lines.
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