They reveal nearly two billion years of the earth's history. 它们揭示了近二十亿年的地球历史
We can read this chapter of the earth's history... 我们可以在科罗拉多大峡谷的山壁上
It's still here, imprisoned in the earth's crust. 它仍然在这里 被囚禁在地壳之中
Bear witness to the earth's original atmosphere. 证明了地球的原始大气层的组成
But even here, on the Earth's frozen bottom, 但即使在这地球最严寒的一端
The Amazon is one of Earth's most endangered ecosystems... 亚马逊是地球上濒临灭绝的生态环境之一
..in Earth's greatest natural wonders. 这里上演着地球上最伟大的自然奇观
And turn it into one of Earth's most productive landscapes. 将沙漠变成地球上最富有生产力的生态系统