这种简单的映射常常很好用，但是在某些时候，由于数据类型、格式或某个应用程序逻辑的不同，您不希望直接进行数据交换。
Quite often, this form of simple mapping works fine, but sometimes, because of differences in data types or formatting or the needs of some application logic, you don't want direct data exchange.
XML提供了强大的数据及业务逻辑功能，用于不同的企业系统与设备之间交换数据。
XML offers powerful data and business logic functionality, for exchanging data between diverse enterprise systems and devices.
分页空间（或交换空间）是一种逻辑卷，用来存储不使用随机存取存储器（RAM）进程的临时区域。
Paging space, or swap space, is a type of logical volume that serves as a staging area for processes that are not using active random-access memory (RAM).
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