Vertebrates that lay hard shelled eggs are called Amniotes.

产硬壳蛋的脊椎动物称为羊膜动物。

So even hard shelled eggs remained susceptible to predators.

因此，即使是硬壳蛋也容易受到捕食者的攻击。

Dinosaur inherited this hard shelled egg laying ability.

恐龙继承了这种产硬壳蛋的能力。

Even today, when you crack eggs to your breakfast, you realize, it's very easy to get into a hard shelled egg.

即使在今天，当您在早餐时打鸡蛋时，您也会意识到，硬壳鸡蛋很容易吃进去。

As animals became terrestrial, spending more and more time out of the water, those animals which could lay hard shelled eggs, had an advantage.

随着动物变得陆生，离开水的时间越来越长，那些可以产硬壳蛋的动物具有优势。