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为什么霸王龙都是小短手? – 译学馆
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为什么霸王龙都是小短手?

Why did T. rex have small arms? | Natural History Museum

Tyrannosaurus rex is one of the most famous dinosaurs
霸王龙是最著名的恐龙之一
With its powerful jaws and huge
看它的有力的嘴和巨大的牙齿
teeth it’s easy to see why
就知道为什么了
But the arms of the dino king seem a little lacking
但是霸王龙的前爪看起来似乎有点没气势
What’s the purpose of these little limbs?
这小前爪是用来干嘛的呢?
Tyrannosaurs are famous for their disproportionately small arms.
霸王龙因其不成比例的小前爪出名
Yet these little limbs were surprisingly well muscled.
然而 这小小前爪的肌肉却异常发达
Scientists are still unsure what they were used for,
科学家仍未确定其用途
but theories have included a role in mating, feeding
据推测 用途可能有交配 进食
or helping the animal stand up from a lying-down position.
或者帮助它们从躺着的姿势站起来
We now know that juvenile tyrannosaurs were much slimmer
我们知道幼年霸王龙比成年霸王龙更苗条
and lightly built than the adults,
体格也更小
with arms slightly more in proportion with the rest of their body.
这时小前爪就和它身体其余部分更协调
So perhaps the young tyrannosaurs were using their arms more to tackle prey.
所以可能幼年霸王龙是用前爪来对付猎物
As the animal grew up
而当恐龙长大了
and developed its massive head and bone-crunching bite,
发育出了巨大的头部和可咬碎骨头的嘴
the arms became less important and simply stopped growing.
前爪就不再重要 也就停止了生长
So essentially it’s walking around with leftover teenager
所以最终 在成年霸王龙身体上
arms on an adult body.
留下了幼年小前爪

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为什么霸王龙是小短手,它的小前爪是用来干什么的?

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