You can easily customize it to show the navigation in a flat list or in a tree hierarchy of varying depth.

您可以轻松对它进行自定义，以在平级列表或在具有不同深度的树层次结构中显示导航。

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Keep the folder structure to a maximum depth of not more than three levels; otherwise, the navigation becomes cumbersome.

保持文件夹结构的最大深度不超过三层；否则，导航起来会很麻烦。

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To ensure navigation safety, considering ships need to keep extra depth, the paper proposes the calculations method of tidal level and time of navigation.

在考虑船舶航行时需留出足够的富裕水深的基础上，提出计算乘潮水位和通航时间的方法。

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There are eight "hazcams" front and back, to take stereo black-and-white pictures for depth perception, and four navigation cameras ("navcams") at the top of an extendable mast.

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