When you add a domain to your DITA installation, the new domain provides you with additional modules.

当向DITA安装中添加一个域时，新域提供了额外的模块。

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You can use the additional modules to incorporate the domain into the existing DTDs or to create new DTDs.

您可以使用这些额外的模块来将该域合并到现有的DTD或创建新的DTD。

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The web portal was designed to support the integration of additional modules to support other needs over time.

该门户网站的目的是能够支持附加模块集成，以支持久而久之其他更多的需求。

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Once injected, the malware would contact one of the many command and control servers around the world and download additional modules as needed.

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Additional modules can sit alongside the existing ones.

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An active palm rest rounds out the modules, with a thumb-wheel and additional action button -- it's joined by a pair of (yet again) adjustable wrist rests that anchor along the bottom edge.

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