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

无论哪种方式，古生代继续由海百合和其他棘皮动物统治。

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

员包括 来自古生代的部分治疗和其他残留物。

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，在盘古陆蔓延。

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。

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

约 2.52 亿年前，古生代因规模灭绝事件而戏剧束了。

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。

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

因此，它们成为整个古生代最重要的指示化石之一。

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

但毫不夸张说， 古生代造就了今天的生活。

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，就形成了蒙拿州丰富的银矿脉。

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

事实上，古生代的许多细分实际上是根据某些牙形石物种首次或最后出现的时间来定义的。

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 是球上生命的成败时刻。

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。

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.

在整个古生代时期， 它们在世界各繁衍生息，许多物种像现代沙丁鱼一样在开阔的海洋中学习，而其他物种则留在离海岸较近的方。