At first, the planet was populated only by the survivors of the Paleozoic.

起初，这个星球上只有 古生代的幸存者居住。

Either way, the Paleozoic Era continued to be dominated by the crinoids and other echinoderms.

无论如何，古生代海百合棘皮动物主导。

But their remains ended up being some of the most important fossils of the entire Paleozoic Era.

但它们的遗骸最终成为整个古生代最重要的化石之一。

So they turned out to be some of the most important index fossils from the whole Paleozoic Era.

所以它们最终成为整个古生代最重要的标准化石。

In fact, many subdivisions of the Paleozoic are actually defined by when certain conodont species first or last appear.

事实上，古生代的许多分期实际上就是根据某些牙形石物种首或最后一出现的时间来定义的。

But it’s no overstatement to say that the Paleozoic Era made life what it is today.

但毫不夸张地说， 古生代造就了今天的生活。

And both groups spent the last period of the Paleozoic, the Permian, spreading across Pangea.

这两个群体都度过了古生代的最后一个时期 ，即二叠纪，在盘古大陆蔓延。

The Paleozoic came to a dramatic end about 252 million years ago with a mass extinction event.

大约2.52亿年前，古生代以一大规模灭绝事件戏剧性地结束了。

The casualties included most of the therapsids and other holdovers from the Paleozoic.

伤亡人员包括 来自古生代的大部分治疗残留物。

So the rich silver veins in Montana formed when water stuffed with ionic compounds ran through cracks in paleozoic limestone.

因此，当充满离子化合物的水流过古生代石灰岩的裂缝时，就形成了蒙大拿州丰富的银矿脉。

Sometimes, too, you will see the term Phanerozoic used to describe the span encompassing the Cenozoic, Mesozoic, and Paleozoic eras.

有时, 您还会看到Phanerozoic一词用于描述涵盖新生代, 中生代古生代的跨度。

It lived in the era before the Mesozoic, in the Paleozoic.

它生活在中生代之前的时代， 在古生代。

The first era of our current eon is the Paleozoic Era, which began 541 million years ago.

我们当前的第一个时代是 古生代，它始于 5.41 亿年前。

But the fact is: the Paleozoic Era was truly a make it or break it time for life on Earth.

古生代确实 是地球上生命的成败时刻。

But certain Jurassic and Triassic forms are now commonly admitted to be teleostean; and even some palaeozoic forms have thus been classed by one high authority.

但是某些侏罗纪三叠纪的形式现在普遍被认为是硬骨动物；甚至一些古生代类型也因此被一位权威机构分类。

Dimetrodon dominated the last period of the Palaeozoic, the Permian Period, alongside many other animals that can seem at once familiar and … not.

二齿兽在古生代的最后一个时期——二叠纪，与许多看起来既熟悉又不熟悉的动物共存并占据主导地位。

And they thrived all over the world throughout the Paleozoic Era, with many species schooling in the open ocean like modern sardines, while others stayed closer to shore.

它们在整个古生代期间遍布全球，许多物种像现代沙丁鱼一样成群游弋于开阔的海洋中，而一些则更靠近海岸线。

With respect to the terrestrial productions which lived during the Secondary and Palaeozoic periods, it is superfluous to state that our evidence is fragmentary in an extreme degree.

至于生活在第二纪古生代的陆生生物，说我们的证据极零碎是多余的。

With its lizard-like appearance and that distinctive sail on it back, Dimetrodon is practically the mascot of the Palaeozoic Era, a time before flowers, birds, mammals, and even crocodiles.

凭借蜥蜴般的外观独特的背帆，异齿龙实际上是古生代的吉祥物，那时候还没有花朵、鸟类、哺乳动物，甚至鳄鱼。

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.

现在, 一般来说, 地质时间首先分为四个大块, 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, 中生代新生代, 最近的生活。