感知距离是旅游研究中不可忽视的现象。

The perception of distance is a phenomenon that can not be ignored in tourism study.

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传感器节点能够感知的物理世界的最远距离称为节点的感知距离。

Sensing range is the maximum range within which a sensor node can detect a target.

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过去的研究认为长距离迁徙动物，在一种名为“隐花色素”的感光蛋白作用下能够感知磁场，即便是果蝇这样的生物，也同样如此。

Previous studies suggest long-distance migrators—and even fruit flies—pick up magnetic fields with the help of a light-sensitive protein called "cryptochrome."

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In other words, we said that in intellectual history, first you get this movement of concern about the distance between the perceiver and the perceived, a concern that gives rise to skepticism about whether we can know things as they really are.

换言之，我们曾说过在思想史上，首先你要知道,关注感知者和被感知者之间距离的运动，这种关注会让我们怀疑,自己是否弄清楚了事物的本来面目。

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