该应用程序使用队列存储x射线图文件。
This application makes use of a queue to store X-ray image files.
注意，数据库和队列存储类型的流使用自定义中介原语来记录请求到达的事实。
Notice that the flows for the database and queue storage types use custom mediation primitives to record only the fact that the request has arrived.
消息队列可驻留在内存或磁盘上，队列存储消息直到它们被应用程序读走。
Message Queue can resident in memory or disk until they are read by application program.
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