开发者们希望应用能在后台运作，这样接收升级和通告信息就不需要用户启动软件了。
Developers would like for applications to run in the background, so they don't have to be opened to receive updates and alerts.
如清单4所示，CEI还提供了一个mdb用来将接收到的JMS消息转换成CBE实例的通告助手。
As shown in Listing 4, cei also provides a notification helper that the MDB can use to convert the received JMS message into an instance of CBE.
一旦他们接收到一个通告，Facebook用户能轻易的同他们的好友分享。
Once they receive a bulletin, Facebook users can easily share it with their Facebook friends.
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