在它索引的时候它降低系统的性能，和现有的桌面应用没有整合。
It taxes the system while it indexes and has no integration with existing desktop applications.
下面介绍的组件，例如部件集和桌面环境，使用X作为底层的系统。
Components described below such as widget sets and desktop environments, use X as the underlying system.
分布式企业桌面常常包含许多机型和多个操作系统版本。
Distributed enterprise desktops often include many makes and models with multiple operating system versions.
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