In these cases, menus with their explicit wording are a much better command vector.

在这种情况下，采用具有清晰文字说明的菜单，才是更好的手段。

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Their chief failing was that with such a limited command vector, the hierarchies became quite deep.

它们最失败的地方是尽管命令数量有限，但也必须深入到各级菜单。

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On devices such as mobile phones and palmtops, menus must often be relied upon as a primary command vector.

在手机以及其他掌上设备上，菜单是一种主要的命令途径。

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