It's built with XUL, an XML-based user interface description language that is also used in the regular Firefox desktop browser.

与普通Firefox桌面版浏览器相同，Fennec也由XUL(一种基于XML的用户界面描述语言)构建。

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In addition to rendering HTML, Gecko also provides a versatile XML-based user interface rendering framework called XUL that was used extensively in those applications.

除了渲染HTML, Gecko还要提供一种应用广泛的，基于XML的用户界面生成引擎，XUL。XUL被用在所有这些程序中。

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In both environments, you use a unique technology-specific, XML-based grammar to lay out and create the user interface.

在这两种环境中，都使用独特的基于XML的语法来布置和创建用户界面。

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