supercontinent

[地]超大陆英释中释na great landmass thought to have existed in the geological past and to have split into smaller landmasses, which drifted and formed the present continents

1 The very first supercontinent was called Vaalbara and it started forming more than 3.6 billion years ago..真正意义上的第一个超大陆名叫瓦尔巴拉，它从36亿年前就开始形成了。

2 Many of us are familiar with the idea that the world's continents once fit snuggly together into one huge single supercontinent called Pangea..我们之中的许多人熟知一个概念：世界的几片大陆曾经紧紧靠在一起，组成了一个超大陆。 我们称之为泛古陆。

3 The dino path to dominance appears to have been cleared when the supercontinent Pangea cracked, setting off 600,000 years of volcanic activity that wiped out the dinosaurs’ crocodilian competitors..恐龙走向繁盛的原因目前看起来开始清楚了，在超级大陆泛大陆开始分裂的时候，持续了600，000年的火山活动，就是这些火山活动摧毁了恐龙的鳄鱼类竞争对手。