With an asynchronous model, the queue itself ACTS as a relief valve.
借助异步模型，队列本身可以充当一个减压阀。
There is an asynchronous callback model and an asynchronous polling model.
其中包含异步回调模型和异步轮询模型。
DEBA is unique because it allows the inherently synchronous web services model to provide the foundation for such an entirely asynchronous architecture.
DEBA的独特之处在于它提供了一个改变，让本来同步的Web服务模型也能够提供完全异步的体系结构。
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