Captive-bred cats often ended up in the illegal wildlife trade.

圈养科动物最终解决，一般都是非法野生动物交易。

But the Russian cats have thick fur to shield them from the cold.

而俄罗斯科动物则有皮毛，帮助它们抵挡严寒。

An anxious cat may vocalize more, and a feline who's losing his hearing may also meow louder.

焦虑可能会发出更多声音，听力减退科动物叫声可能更大。

What is the largest cat that lives in north America?

生活在北美最大科动物是什么？

Adult male lions are the only cats to have manes!

成年雄狮是唯一长有鬃毛科动物！

A radio collar has given researchers an insight into the life of the most elusive of Africa's big cats.

无线电项圈让研究人员能了解到非洲最神秘科动物生活。

They might be big, ferocious pussycat predators.

它们可能是大型凶猛科动物捕食者。

In addition, lions are the only cats to live in groups.

狮子也是科中仅有一种群居动物。

The snow leopard is the world's highest-living big cat.

雪豹是生存在世界上海拔最高处科动物。

But it wasn't the only big cat around 13,000 years ago.

但是在13000年以前，大型科动物种类更多。

The iconic felines traditionally wear wreaths at christmas time.

传统上，典型科动物在圣诞节戴花环。

Whilst the cat with the pointed ears is prowling around down here.

而这种尖耳朵科动物却是在树下面溜达。

They are in fact the largest cats that ever lived.

它们是迄今为止最大科动物。

Next she examined the tongues of other cats in the species, like lions.

接着她又检查了其他科动物舌头，如狮子。

The American lion is arguably the largest and most powerful feline that ever lived.

美洲拟狮有可能是有史以来最大最有力科动物。

The world's highest and, just maybe, most lonesome cat.

世界上生存海拔最高，也许是最孤独科动物。

So how did ferocious felines become purr-fect pets for millions of us around the world?

所以凶残科动物是如何变成世界各完美呼噜宠物?

There was no federal law regulating big-cat ownership.

当时没有联邦法律对大型科动物所有权进行监管。

The jaguars in the Pantanal are the biggest cats anywhere in the Americas.

潘塔纳尔美洲虎是美洲区最大科动物。

Lions are the only cats to live together in big family groups called prides.

狮子是唯一一种群居大型科动物。