It is a specific type of BlockingQueue: getting an item from the queue will block until the delay has passed, if an item isn't available immediately.

它是一种特定类型的BlockingQueue：如果一个项不可用，则从队列获取该项会受到阻止，直到延迟失效。

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But if you wish to obtain a specific item — or a slice of a few items — you need to start caring about the exact type of thing. For example.

但是，如果希望获得其中的一个特定条目(或一些条目的切片)，就需要考虑thing的具体类型。

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Figure 6 illustrates the output of Listing 7 with video and additional details such as type (link), title (Drupal), author (the item is blank with no specific author named), and provider (Wikipedia).

图6演示了清单7的输出，带有视频和附加的详细信息，比如类型(link)、标题(Drupal)、作者(这一项为空，没有指明特定的作者)和提供者(Wikipedia)。

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