第6 - 7行展示了将被发布的消息的主题名称。

Lines 6-7 show the topic name to which this message will be published.

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数组中的每一项都是客户机感兴趣订阅的主题名称。

Each entry in the array is the name of a topic the client is interested in a subscribing to.

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这些消息还可以以不同的主题名称发布，这样就可以由不同的消息服务使用。

These messages can also be published with a different topic name so that they can be consumed by different message services.

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