标准化确保应用相同的等级和度量。
Standardization ensures that common scales and measurements are applied.
用户查看应用的目录时，例如游戏，无法按等级或更新时间来排序。
While users can whittle apps down to broad categories, such as games, they can't sort by rating or recently added.
消息被发送到级别最高的一个或多个队列，因此这个细粒度允许对队列排序，以表明应用程序可用性的等级。
Messages are sent to the highest ranked queue or queues, and so this granularity allows queues to be ordered to indicate grades of application availability.
应用推荐