Tommotian and Burgess Shale formations give clues about Precambrian evolution.

，Tommotian和伯吉斯页岩化石群为前寒武纪进化提供了线索。

But red in tooth and claw the Precambrian was not—for neither teeth nor claws existed.

但是前寒武纪时期却不是腥牙血爪，因为那个时候牙齿和爪子都没有出现。

But basically, you know, the 90s and internet feels like a pre-Cambrian era when there were only sponges.

但基本上，你知道的，90代和互联网给人的感觉就像前寒武纪时代，那时只有海绵宝宝。

They're going to get the Precambrian period.

他将会经历前寒武纪时期。

In northern Australia, there hasn't been any new mounted buildings since the pre-Cambrian era that ended one and a half billion years ago.

澳大利亚北部，自 15 前的前寒武纪时代结束后，就再也没有出现过新的建筑。

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

但到了5.08前的寒武纪鼎盛时期，动物界已经疯狂蔓延。

He told the Associated Press it is believed that " … modern animal groups like jellyfish appeared 540 million years ago in the Cambrian explosion."

他告诉美联社，据信“… … 诸如水母之类的现代动物群体出现5。4前的寒武纪大爆发期。”

Life on earth has existed for 4 billion  years, mostly as single celled organisms until some 540 million years ago the Cambrian  explosion heralded the age of animals.

地球上的生命已经存了40，大多数时候都是单细胞生物，直到大约5.4前的寒武纪大爆发才迎来了动物的时代。

Follow-up work by Dr Zhu, in nine other sections of the Doushantuo formation, suggests this surge started just after the final Precambrian glacial period about 560m years ago, and went on for 9m years.

后续的工作由朱博士完成，有九个其他的陡山沱构造说明这个激增仅仅是最后一次前寒武纪冰川之后，大约5.6前，并且持续了900万。

Nowadays, and speaking very generally, geological time is divided first into four great chunks known as eras, Precambrian, Paleozoic, from the Greek meaning old life, Mesozoic, middle life, and Cenozoic, recent life.

现, 一般来说, 地质时首先分为四个大块, 称为时代, 前寒武纪, 古生代, 来自希腊语, 意思是旧生活, 中生代, 中生代和新生代, 最近的生活。

One of the most famous stories of life returning from the depths of time starts over half a billion years ago, in the Cambrian Period, right when life was getting its feet under it.

最著名的生命从时深处回归的故事之一始于 50 多前的寒武纪，当时生命刚刚开始它的脚下站稳脚跟。