And there were an abundance of duckbilled dinosaurs called Hadrosaurs.

还有很多嘴部像鸭喙的恐龙，称之为鸭嘴龙。

So they named this duckbilled dinosaur, Maiasaura, the " good mother reptile."

因此，他们将这种鸭嘴龙命名为 Maiasaura，意为“好妈妈爬行动物” 。

All of the rest of the dinosaurs -- like the horned, armored, and duckbilled dinosaurs -- are known as ornithischians, and they didn't have these features, so they weren't as light on their feet.

所有其他的恐龙——比如有角的、装甲的和鸭嘴龙——都被称为鸟臀目，它们没有这些特征，所以它们的脚没有那么轻。