It affected the young animal's front legs, which became hyperextended.

这种疾病影响了幼崽的前肢，使前肢腕关节过度伸展。

All birds have two legs and two arms; but these arms are not like ours.

所有的鸟儿，都有两个后肢，两个前肢。但是鸟儿的前肢， 跟我们人类的不一样。

Powerful forelegs enable it to rip apart a termite hill with ease.

有力的前肢让它们能够轻易地掰开白蚁巢。

Whereas with pterosaurs, with this strategy, you're focusing it into one area and really use it both ways.

所，的飞行只会使用到前肢。

This meant that the arms were very strong, but their function is somewhat of a mystery.

这说明它的前肢非常强壮，不过其功能有点像个迷。

Eventually, their front limbs became flippers and their hind limbs became weak and unnecessary.

最终，它们的前肢变成了鳍状肢，而它们的后肢变得虚弱和多余。

The female would've had the same short arms and legs, sharp teeth and power tail.

该有类似的前肢和腿锋利的牙齿和有力的尾巴。

And they were almost right. Longer front legs and larger toe pads indeed helped.

他们的想法基本上是对的。前肢更长、趾垫更大确实有帮助。

We call them wings, and the birds use them for flying.

我们管鸟儿的前肢叫" 翅膀" ，鸟儿就是用翅膀来飞翔的。

Its powerful arm muscles are composed of 80% fast-twitch fiber, a third more than humans.

它强壮的前肢肌肉中百分之八十是快缩肌纤维，比人类的多三分之一。

Technically, two-toed sloths should be really called two-fingered sloths because the difference is only their front limbs.

从技术上讲，二趾树懒该被称为二指树懒，因为它们的区别只是前肢。

What you can see is that large toe pads and strong front legs give some lizards a tighter grip.

你可看到的是，大的护趾和强壮的前肢使一些蜥蜴抓握更牢。

Led by his super sensitive nose, his long limbs carry him many miles a day in search of carrion.

凭借极度敏感的嗅觉和长长的前肢，短面熊为了寻找腐肉能一天行进数英里。

The shape of the creature's hands and forelimbs suggest it was a skillful and powerful digger, scientists say.

学家说，这种生物的手和前肢的形状表明它是一种熟练而有力的挖掘者。

Utahraptor will usually grasp its prey with its arms and use its leg claws to slash at its victim.

犹他盗通常会用前肢抓住猎物，然后用它的脚爪划割猎物。

She has long, strong front legs to help her climb around for food 20 metres up in the canopy.

它的前肢又长又有力，可帮助它在 20 米高的树冠上四处攀爬觅食。

Along with its unique skull design, Ceratosaurus has another feature that distinguishes it from other predators: four fingers on each hand.

它的前肢各有四只手指。

Before the lion can reach the bear's throat, the bear is able to hold off the attacker with its arms.

在拟狮能够咬到熊的喉咙之前，短面熊能够用前肢挡住进攻者。

It had extremely large claws on its hand which were very useful for gripping and tearing.

它前肢的爪子非常大，对抓住和撕扯猎物是很有用的。

And so it could reach out and smack things with those long arms if it needed to.

如果有必要它们能够伸出长长的前肢猛击目标。