Whales today are much bigger than Pakicetus was. And I mean MUCH bigger.

今天的鲸鱼比巴基鲸要大得多。大非常非常多。

Whales today are much bigger than Pakicetus was.

今天的鲸鱼比当时的巴基鲸大得多。

Like other aquatic mammals, such as dolphins and porpoises, this wolf-sized animal, known as Pakicetus, is part of the cetacean group.

像其他水生哺乳动物，如海豚和鼠海豚一样，这种体型像狼一样大小的动物被称为巴基斯坦古鲸，是鲸类的一员。

That is 4,000 times bigger than the estimated 45 kilogram Pakicetus, and 30 times bigger than the current largest land animal, the African Elephant, which weighs around 6,000 kilograms.

据估计，巴基鲸有45千克，蓝鲸的重量比它大4000倍。而且蓝鲸比目前最大的陆地动物非洲象大30倍，非洲象重约6000公斤。

So when did whales lose their legs? Well, over the 15 million years following Pakicetus, they transitioned to a solely aquatic lifestyle and their limbs slowly became smaller and smaller.

所以鲸鱼的腿是什么时候消失的呢？在巴基鲸后的1500万年间，它们转变成一种完全水生的生活方式，它们的四肢慢慢地越变越小。

As fish-eaters, this walking monstrosity would need to reside near coastlines or riverbeds so it could spend its days fishing in the water, similar to Pakicetus who ate fish as well as small land animals.

作为食鱼动物，这种会走路的怪物需要生活在海岸线或河床附近，这样它才能在水中捕鱼，类似于吃鱼和小型陆地动物的巴基鲸。