在发送通知时，如果消息顺序是混乱的，则要发送序列号，让客户机应用程序可以对消息排序。
Whenever I send a notification, I want to send a sequence number that allows client applications to sort the messages, should they show up out of order.
中介处理程序列表可能包含一个或多个中介，并且控制中介的执行顺序。
Mediation handler lists may contain one or more mediations, and they control the order in which mediations are executed.
缓存清单是一个文本文件，按顺序列出所有需要缓存的应用程序资源，确保特定应用程序运行，而无需连接因特网。
The cache manifest is a text file that lists all application resources that need to be cached in order for the given application to work without an Internet connection.
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