giving us many of the animals we still have today... 为我们带来许多今天仍然存在的动物
Scutosaurus, among the largest animals on land. 盾甲龙是陆地上最大的动物之一
another group of animals were undergoing their own radical change. 另一群动物正在经历巨变
They are the most abundant group of animals on Earth. 它们是地球上数量最多的动物
The first animals to ever set foot on land were the arthropods. 率先踏上陆地的动物是节肢动物
Without this critical ingredient for life, animals started to suffocate. 没有了这种不可或缺的生命成分 动物开始窒息
all kinds of animals headed into the abyss. 各种动物都朝深渊前进