Precambrian animals must therefore have lived at such depths.

因此，前寒武纪动物肯定曾经生活在这么深地方。

These findings are not of Precambrian animals themselves, but of their tracks.

现并不是寒武纪前动物本身，而是它们足迹。

The fall of the Ediacaran fauna was followed by the creative outburst of the Cambrian period.

埃迪亚卡拉动物群没落之后是寒武纪创造性。

But some might be the ancestors of the Cambrian megafauna.

但是他们中一些可能就是寒武纪大型动物祖先。

In the context of the Cambrian, explosion would soon have more to do with modern tempers than ancient physiological facts.

联系到寒武纪氛，“”很快跟现代人脾气，而不是跟古代生理事实更有关系。

Back in the Cambrian, new phyla and new classes arose. Nowadays we only get new species!

而在寒武纪，新新纲不断产生。如今我们只有新种！”

A billion years after that, 3.5 billion years after life started, is the extraordinary Cambrian explosion.

10亿年后， 也就是生命开始后35亿年，是非凡寒武纪大。

Early Cambrian eocrinoids stuck lightly to sediment or just rested on it while suspension-feeding.

寒武纪早期类分泌物轻轻地粘在沉积物，或者只是在悬浮喂养时停留在沉积物。

The schoolboy turned it in to a paleontologist at the University of Leicester, who identified it at once as Precambrian.

那位小学生把化石交给了莱斯特大学一位古生物学家。他马认出那是寒武纪之前东西。

On the further verge of the Cambrian rose the crystalline rocks from which every trace of organic existence had been erased.

在寒武纪更远边缘， 出现了水晶般岩石， 所有有机存在痕迹都被抹去了。

The pattern that we saw in the Cambrian, of a long period nothing happeningand then a burst, is here right now.

我们在寒武纪看到模式，即很长一段时间没有生， 然后突然，现在就在这里。

But by 508 million years ago, during the height of the Cambrian, the Animal kingdom was running riot.

但到了 5.08 亿年前， 在寒武纪鼎盛时期，动物王国正处于暴乱状态。

It's as if, at one instant in this time we call the Cambrian Era, complex multi-cellular life suddenly emerged almost intact on the planet.

在寒武纪一段很短时间里，各种复杂多细胞生物突然横空出世。

For millions of generations they thrived by laying low on the ocean floor, but the seas the Cambrian were becoming increasingly hostile.

数百万代以来， 它们在海底低处繁衍生息，但寒武纪海洋变得越来越敌对。

Seaweeds, jellyfish-like creatures, sponges and the odd worm do start to put in an appearance a few million years before the Cambrian begins.

海藻、类似水母生物、海绵生物奇怪虫子确实在寒武纪开始前几百万年已经出现。

Between 535 and 520 million years  ago, a new kind of biological litter began collecting in the ancient  oceans of the Cambrian period.

535 至 5.2 亿年前，一种新型生物垃圾开始在寒武纪古代海洋中聚集。

This then enabled the rise of carnivores, which in turn spurred a productive arms race, resulting in what's known as the Cambrian explosion.

这就促成了食肉动物出现，它们激起了一场繁殖力竞赛，最后演变为我们所知寒武纪大。

Adam Sedgwick of Cambridge claimed for the Cambrian period a layer of rock that Roderick Murchison believed belonged rightly to the Silurian.

剑桥大学亚当·塞奇威克 (Adam Sedgwick) 声称, 寒武纪时期一层岩石, 罗德里克·默奇森 (Roderick Murchison) 认为属于志留纪。

The new adaptations that had come about during the Cambrian, like pincers, spikes, and claws, were really starting to come in handy.

寒武纪期间出现新适应性，如钳子、尖刺爪子， 真开始派用场了。

Communities of priapulids and other similar organisms changed the seafloor from hard matgrounds to the softer sediment found in the Cambrian.

priapulids 其他类似生物群落将海底从坚硬地垫变为寒武纪较软沉积物。