But duckbills had never been found in Africa.

但在非洲从未发现过鸭嘴兽。

Nonetheless, there's evidence that duckbills were well-adapted for swimming.

尽管如此，有证据表明，鸭嘴兽很适合游泳。

So this is one where the duckbill is definitely more powerful than the predators.

所以在这一点上来说鸭嘴龙远比掠食者有力得多。

Unless, perhaps, duckbills swam hundreds of miles across open ocean from what is now Europe.

除非鸭嘴兽从现在的欧洲游几百英里穿过广阔的海洋。

The duckbill had a thick hide and the ability to shake rapidly to throw off attackers.

鸭嘴龙有厚厚的皮，也有能力迅速晃动甩掉攻击者。

They would reveal the identity of the dinosaur that feasted on the duckbill.

他们将揭开进食鸭嘴龙的恐龙身份。

In North America, fossils of duckbill dinosaur are abundant.

在北美，鸭嘴兽的化石非常丰富。

To better understand the migrations of duckbill dinosaurs, Longrich and his colleagues reconstructed their evolutionary tree.

为了更好地理解鸭嘴龙的迁徙，隆瑞奇和他的同事重建了他们的进化树。

But because we don't, it appears that the duckbill was already dead before the T-Rex even showed up.

但是因为我们没看到，看起来在霸王龙现身之前这头鸭嘴龙就已经死了。

They have a particular spot where they are going to try to drive the duckbill towards.

它们有个特别的地点，现在正在把鸭嘴龙往那里驱赶。