Conservationists intent on preserving charismatic megafauna have reason to lament the spread of plastics through the ocean.

致力于保护引人好奇的大型动物的环保人士有理由担心海洋塑料污染的蔓延。

We've always wondered why Africa has the megafauna, why it has these great grand wildernesses, these great migrations.

我们一直想知道为什么非洲会有巨型动物，为什么会有这么大的荒原，以及这些大迁徙。

But most of these so-called megafauna disappeared once humans hit the scene.

但人类抵达后，这些巨型动物就消失了。

FEW megafauna are more charismatic than elephants, and that charisma gives them political clout.

在大型动物里，没有几种动物可以匹敌大象的魅力，这种魅力让大象很有政治影响。

But some might be the ancestors of the Cambrian megafauna.

但是他们中的一些可能就是寒武纪大型动物的祖先。

But in the short term, one of the biggest hurdles these charismatic megafauna face is us.

但在短期看来，这些富有魅力的巨型动物面对的最大的障碍是我们。

And with these megafauna around to eat the fruit, avocado trees could keep growing berries with increasingly massive seeds.

有了这些巨型动物光顾，牛油果树就能继续结果，继续结出更巨大的种子。

They littered the surface of the water and just so many megafauna whales and dolphins and marlin jumping out.

它们遍布水面，还有许多巨型动物鲸鱼、海豚和马林鱼跃出水面。

This march of megafauna mortality coincides suspiciously with the arrival of another large animal in their vicinity: humans.

与此同时，附近的另一种大型动物，人类到来了。

Occasionally, the bodies  of megafauna, like whales, sink to the ocean floor.

偶尔，巨型动物的尸体，如鲸鱼，会沉入海底。