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如今，我们的世界生机盎然，随处可见活着的生灵。那么请想象一下所有这些生命有95%在一瞬间遭到了毁灭。这不是虚构的故事，它确实发生过。就在3亿年前的二迭纪，地球上还是一片丰饶繁荣的景象，然而2亿5千万年前的一场神秘事件导致了95%的物种灭绝，称为二迭纪生物大灭绝。这个凶残的杀手究竟是谁？是剧烈的地质运动、气候灾变，还是来自外太空的天体碰撞？为此，科学家们展开了一系列调查，试图解开“地球劫难日”惨剧背后的真相。
n. 范围，行列，射程，山脉，一系列
v. 排
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- There was just a huge range of little tiny fossils in these rocks,
- 这些岩石中包藏着大量微小的化石，
- which were telling us in fantastic detail just what was going on at this time
- 含有关于那个时期相当丰富的信息，
- and there was no need to guess anymore, we could actually see the order in which things were going extinct
- 毫无疑问，我们能从中了解到生物灭绝的顺序，
- and get the full extinction story right from the beginning all the way through to the end.
- 从而从头到尾了解整个灭绝过程。
- For the first time he was able to work out exactly what had happened.
- 他将首次揭露当时到底发生了什么。
- It was a complete surprise.
- 结果令人大吃一惊。
- The extinction had occurred in 3 distinct phases.
- 大灭绝经历了3个独立的阶段。
- The extinction crisis first begins on land
- 大灭绝首先是在陆地上开始的，
- and what we see is species of plants, species of animals start disappearing about 40,000 years this goes on for.
- 陆地上的动植物都相继灭亡，这一阶段大约持续了4万年。
- This was the first phase, a period when some, but by no means all, land species died.
- 这是第一阶段，这一时期导致部分而不是全部陆地物种灭亡。
- And then what happens next at about 40,000-45,000 years after the crisis has begun
- 接下来在大灭绝开始后的40000-45000年间，
- is that we see a really quite sharp, abrupt extinction in the seas at this time,
- 是一个非常剧烈而突然的海洋物种灭绝时期，
- so this is the marine extinction event, much shorter and sharper than what we see on land.
- 这就是海洋生物大灭绝事件比先前陆地上的短暂迅猛得多。
- So the second phase of the extinction was the abrupt death of virtually everything in the sea.
- 看来大灭绝的第二阶段导致所有海洋生物极速灭亡。
- Then came the third phase as the extinction moved back to the land.
- 接下来就是第三阶段，大灭绝再次杀回陆上。
- Following on from that we then see the culmination of the land extinction,
- 在那之后便是陆地物种灭绝的高潮，
- so we start losing all our typical plants and all our typical animals as well,
- 所有最典型的动植物都开始消失，
- and this carries on to a point of about 80,000 years after the extinction began.
- 这一阶段一直持续到大灭绝开始后大约8万年。
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