In the early Tertiary, if you were the size of a bobcat you could be king.

在三纪，有红猫的个儿那么大，就可以称王称霸了。

Discokeryx lived in open grasslands with small groups of trees during a time known as the Miocene period.

在三纪中新世时期，獬豸盘角鹿生活在开阔的长有小片树木的草原上。

And the top layers of softer alluvial deposits he named Tertiary and Quaternary.

他将顶层较软的冲积沉积层 命名为三纪和四纪。

Cretaceous–Tertiary (K–T) extinction - For number one, we’re stepping as far back in time as we can.

三纪 ( K- T) 灭绝— 白垩纪-— 一， 我们尽可能地回到过去。

She collected samples from eight KT boundary sites, from New Mexico in the south right up into western Canada.

她从8个分有三纪界线层的地点采集样本，从南部的新墨西哥一直到加拿大西部。

The time in geological history that separates that end of the Cretaceous from the Tertiary Period is marked with a very distinctive band of clay.

在地质历史中分开白垩纪末期和三纪的那段时间被记录在非常独特的一层黏土中。

In some books, too, you will find the tertiary and quaternary taken out and replaced by periods of different lengths called the Palaeogene and Neogene.

在有的书里，还会发现不用三纪和四纪，而用不同长度的系来取而代之，称三系和上三系。

But this thick layer of Iridium that separates the Cretaceous and Tertiary periods clearly was an anomaly and it had been deposited over a very short time.

但这个隔开了白垩纪和三纪的厚铱层显然个异常事物，而且它在很多的时间内便沉积来。

Hence, we can understand how it is that the flora of Madeira, according to Oswald Heer, resembles to a certain extent the extinct tertiary flora of Europe.

因此，我们可以理解， 根据 Oswald Heer 的说法， 马德拉岛的植物群在某种程度上类似于欧洲已灭绝的三纪植物群。

Why this should be so we do not know; nor why the later tertiary periods should have been much more favourable for their existence than the present time.

数量之多无可比拟。 为什么会这样我们不知道； 也不知道为什么后来的三纪时期应该比现在更有利于它们的存在。

The leathery, undeteriorative, and almost indestructible quality was an inherent attribute of the thing's form of organization, and pertained to some paleogean cycle of invertebrate evolution utterly beyond our powers of speculation.

这种坚韧不破不可摧毁的特质该物质结构的内在特征之一，属于无脊椎动物进化过程的某种三纪周期，远非我们的推断力所能及。

To be precise, we will be going back 66 million years ago to an event known as The Cretaceous–Paleogene extinction event, which is also known as the Cretaceous–Tertiary or K–T extinction.

准确地说， 我们将回到 6600 万年前的白垩纪-古近纪灭绝事件，也称为白垩纪-三纪或 K-T 灭绝事件。

And, we would expect that, back in the Miocene, there were little pods of sperm whales, and we might also suppose that if they came under attack they might try to help defend each other.

我们可以想象，在三纪中新世，抹香鲸就这样小群活动，而且我们也能推测如果它们受到攻击它们会帮助保护彼此。