Dinosaurs first appear in the fossil record during the Triassic period, some 230m years ago.

恐龙最早出现在三叠纪时期(距今约2.3亿年)的化石记录中。

The Triassic period was an incredibly important 50 million years of evolution.

三叠纪时期是一个非常重要的 5000 万年的演化时期。

During the Triassic period, the continents were joined together into Pangea.

在三叠纪时期，各大洲合并为盘古大陆。

Pangea did not begin to break apart until the end of the Triassic period.

直到三叠纪末期，盘古大陆才开始分裂。

Around 250 million years ago, during the Triassic period, a class of reptiles called archosaurs split into two main groups.

大约 2.5 亿年前的三叠纪时期，一种叫做主龙的爬行动物分为两大类。

Late in the Triassic period Ichthyosaurs were joined in the seas by another group of reptiles that also evolved an aquatic lifestyle.

在三叠纪晚期，鱼龙与另一群也进化出水生生活方式的爬行动物一起出现在海洋中。

The Reign of the Dinosaurs Dinosaurs emerged during the Triassic period, about 230 million years ago, and ruled the Earth for nearly 165 million years.

恐龙的统治 恐龙出现在三叠纪时期，距今约 2.3 亿年前，统治地球近 1.65 亿年。

But according to a new study published in the journal Nature Communications, we were wrong The study is about an archosauromorph called Dinocephalosaurus, a marine reptile dating back to the Triassic period.

但根据发表在《自然通讯》杂志上的一项新研究，我们错了。 这项研究是关于一种名为恐龙头龙的主龙类动物， 这是一种可追溯到三叠纪时期的海洋爬行动物。