It is often possible to see the vestigial remains of rear limbs on some snakes.

在某些蛇身上常可看到退化后肢的痕迹。

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The particular design of muscles and bones in the neck and limbs of the turtle allow that it can draw in its exposed parts such that an attacker can find nothing but hard shell to bite.

海龟颈部和四肢的肌肉及骨骼的特殊设计使它能把暴露在外的部分缩回去，这样攻击者只能去咬坚硬的外壳。

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Fossilized remains of Acanthostega, a primitive fish, reveal that even though the animal had rudimentary limbs, it could not walk on land.

棘螈是一种原始鱼类，它的化石遗迹显示，尽管棘螈有基本的四肢，但它却不能在陆地上行走。

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So that means that we assume that it's better to have limbs and functioning limbs than not to have them.

这意味着，我们默认，有正常的四肢的生活,要比没有四肢的生活好过。

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When it comes to using your limbs and other basic functions, it is basically a "use it or lose it" situation, Gupta said.

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In June a Fab Lab was shipped to Afghanistan, where it will make prosthetic limbs.

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Since Kinect employs cameras to determine the position of various limbs, it can offer video calling and "reaction shots" as demoed in Microsoft's E3 press conference.

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