Per message delivery semantics: These semantics allow for each message to be delivered differently as well as use a different guarantee level per message.

每消息传递语义：这些语义允许被传递的每个消息都是不同的，而且每个消息使用不同的保证级别。

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In short, MOM excels in providing asynchronous communication between processes, publish-subscribe (one-to-many) message delivery semantics, and high levels of reliability.

简而言之，MOM擅长于提供流程间的异步通讯、发布-订阅(一对多)消息来传递语义和保证高可靠性。

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Publish-and-subscribe messaging is a way to achieve one-to-many delivery semantics between applications for a given message as shown in figure 2.

发布-订阅消息传递是针对一条特定消息在应用程序间实现一对多传递语义的消息传递方式，如图2所示。

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