Cretaceous. Let's delete that as well.

白垩纪。这个也要删掉。

Evidence that these lizard kings dominated the oceans in the Cretaceous period.

这种发现证明了这些蜥蜴王在白垩纪就统治了海洋。

But that didn't stop dinosaurs from nesting there during the Cretaceous period.

但这没阻挡在白垩纪在此筑巢。

The early Cretaceous fossils that we find in Maryland are preserved in sandstones and clay-stones.

我们在马里兰发现白垩纪早化石保存在砂岩和粘土岩中。

All these Cretaceous plant eaters, with their complicated apparatus, they're all much more sophisticated.

所有这些白垩纪食草动物都有其复杂防御器官，它们都是很高级生物。

A Quetzalcoatlus could be seen as a Cretaceous stealth bomber... Air-to-ground weaponry at its finest.

风神翼可谓白垩纪隐形轰炸机...它拥有最先进空对地武器。

Over the next 90 million years, a new era called the Cretaceous period dawned.

在接下来九千万年里，开始了一个叫做白垩纪。

Well, Edmontosaurus was sort of the Wildebeest of the Cretaceous plains.

埃德蒙顿就好像是白垩纪平原上牛羚。

During the Cretaceous period, 140 million years ago, this dinosaur sported a neck of dangerous looking spines.

在一亿四千万年前白垩纪，这种脖子上长着看起来很危险刺。

That is fair enough. Such landscapes were common during the beasts' heydays, the Jurassic and Cretaceous periods.

这很合理，因为这样景观在侏罗纪和白垩纪野兽鼎盛很常见。

That happened 66m years ago, at the end of the Cretaceous period.

这一切就发生在6600万年前白垩纪末。

In the case of pelagornithids, this particular role would be filled by flying reptiles in the Cretaceous period.

白垩纪，飞行爬行动物会取代 pelagornithids 这一特殊角色。

The findings suggest large sizes in marine turtles developed independently in separate Cretaceous lineages in North America and Europe.

研究结果表明，在北美和欧洲不同白垩纪谱系中，体型较大海龟独立发育。

We get into the Cretaceous period, that's kind of the flower of the dinosaur world and dinosaurs are cosmopolitan.

进入白垩纪，这是世界巅峰，遍布全球。

During the mid-Cretaceous period, this thing, without a doubt, was the most dangerous and nastiest animal on planet earth.

在白垩纪中，这家伙毫无疑问，是地球上最危险可怕动物。

The Cretaceous period was much cooler than that of the Jurassic that preceded it.

白垩纪远比之前侏罗纪更加寒冷。

I'm going to delete " cretaceous, " I'm going to delete " Cenozoic" and I'm going to delete " iridium."

我要删除“白垩纪”、“生代”、“铱”。

But early in the Cretaceous period, both species would eventually lose the bigger fight, becoming extinct.

不过在早白垩纪，两个物种都逐渐在另一场更大斗争中败下阵来，它们都灭绝了。

The best-documented such impact took place 65 million years ago at the end of the Cretaceous period of geological history.

记载最完整这种灾难曾发生在6500万年前，在地质历史阶段白垩纪末。

By the end of the Cretaceous period, global environmental changes saw the emergence of tougher, more fibrous species of plants.

到了白垩纪末，全球环境变化带来了更坚韧、纤维更多植物物种。