手动启示数量很少。

There are only a few manual affordances.

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一个未加修饰的虚拟手动启示缺少其所执行的功能信息。

What's missing from an unadorned, virtual manual affordance is any idea of what function it performs.

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但是为了清晰起见，我们将这种如何用手操作对象的本能理解称为“手动启示”。

For clarity, however, we'll call this instinctive understanding of how objects are manipulated with our hands manual affordance.

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