Their strategy has been so successful, 它们的策略非常成功
Australia had been heading north for millions of years. 澳大利亚已经向北漂移了数百万年
Birds had almost been wiped out with the rest of the dinosaurs. 鸟类几乎全都与其它恐龙一起灭绝
Wings that have been modified to flap. 翅膀变得能够挥动
there had been hundreds of ancient species living in the trees, 树上居住着数百种古老的物种
the picture couldn't have been more different. 却完全是另一幅画面
and the world has all but been destroyed by a cataclysmic event. 世界几乎被一场灾难性事件摧毁
having been locked in an arms race with snakes 在这个过程中
They've been playing this game since the dawn of the dinosaurs. 它们从恐龙时代初期 就开始玩这个游戏