因为队列的大小没有界限，使得添加可以立即返回，但是在延迟时间过去之前，不能从队列中取出元素。

While the queue is unbound in size, enabling adds to return immediately, one cannot take an element from the queue until the delay time has expired.

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跨许多个数据元素来看，这样的延迟是累加的。

Across many data elements, this delay can add up.

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其中最重要的一点是决定哪些架构元素可以延迟哪些不能。

One of the most important up front architectural activities is deciding which architectural elements can be deferred and which cannot.

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