The error here is far too deep: not only do humans need nature for themselves, but the very idea that humanity and the natural world are separable things is profoundly damaging.

这错误太离谱了：人类不仅需要自然，而且认为人与自然世界是可分离的这一观念本身就具有强大的破坏性。

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Tech company UneeQ is heading for its "digital humans", which appear life-like on the screen not only in terms of language, but also because of facial movements: raised eyebrows, a smile, even a nod.

科技公司 UneeQ 正在开发他们的“数字人类”，他们在屏幕上看起来像真人，不仅在语言方面，还有面部动作：扬起的眉毛、一个微笑，甚至是一个点头。

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Not only did these early domesticated cows produce very little milk but, more importantly for humans, drinking cows' milk is very much an acquired skill. Martin Jones again.

首先这些早期驯化牛根本就产生不了多少牛奶，但最重要的仍是，对人类而言，喝牛奶其实是一种获得性的技能。

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This quieting of nature is not only alarming for the natural world but unhealthy for humans, too, believes Krause.

CNN: Meet the man recording the sound of extinction

It is a well known factor that chronic stress can lead to RRBI type behaviors, not only in humans but in other animals, like rats, with the only other requirements currently required for a diagnosis potentially as limited as deficit in ability for back and forth conversation and developing and maintaining peer appropriate friendships.

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While it will probably take at least another 20 years before Zubrin -- or anyone else for that matter -- makes it to the Martian surface, NASA and other space agencies are already drawing up plans for a voyage that will present astronauts not only with physical but also psychological challenges never faced by humans before.

CNN: Mars on the brain? Red Planet pioneers to face cosmic mind trip