Al t属性是用来为盲人web使用者描述图像的。

The Alt attribute is what describes your image to a blind web user.

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在此情况下，将启用使用者应用程序，通过使用存储库中的特定名称或属性查找服务以动态地绑定到不同的服务实例。

In this case the consumer application is enabled to dynamically bind to a different service instance by looking up services with a specific name or property in the repository.

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代理的操作原则是将 Portlet 作为类型化属性的生产者和使用者；因此，它也称为 属性代理 (Property Broker)。

The broker operates on the principle of portlets being producers and consumers of typed properties; therefore, it is called the Property Broker.

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