评论
打印
When they looked further, there were clear signs that the fish had been killed by a volcanic eruption,
他们继续搜寻后发现，一些显著迹象表明这些鱼的确死于火山爆发
but then the evidence became more confusing.
可是后来的证据开始变得模棱两可
When Oliver's team looked on land they found nothing,
当Oliver的小组研究陆地状况时，他们一无所获
no sign of an extinction event affecting the dinosaurs.
没有证据表明灭绝事件影响了恐龙
Whatever had killed the fish and caused the mass extinction in the oceans, it hadn't affected life on land.
不管是什么杀死了鱼，并导致海洋中的大灭绝，它并没有影响到陆地生物
That meant dinosaur evolution couldn't have been kick-started by a mass extinction. That theory was wrong.
也就是说恐龙的进化并非由大灭绝引爆，这种假设是错误的
It meant scientists would have to find something else,
这意味着科学家们必须找出其它原因
something equally connected to the break-up of the super-continent
超大陆的分裂还关系到另一事件
and powerful enough to have transformed the evolution of the dinosaurs,
它的强大作用也足以改变恐龙的进化历程
so they turned to another theory: climate change.
因此他们开始关注另一种观点：气候变化。
