虚拟内存段还包含字典缓存器，存储过程缓存器，以及在向磁盘一次性写入大块页面时使用到的较大的缓冲池。

Virtual segment also contains dictionary cache, stored procedures cache, and big buffer pools used for writing large block of pages to disk at once.

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字典中是这样定义时间的：时间就是事情发生的时刻或时间段。

A dictionary defines time as "the point or period at which things occur."

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Seaside每捕获一个continuation，就将它保存在一个字典里直到一段时间过去，会话到期。

Each time Seaside captures a continuation, it stores it in a dictionary until a certain period of time passes and the session expires.

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