- Far back in the depths of time,
很久很久以前 - Earth looked nothing like the world we know today.
地球的样貌与现在完全不同 - Nearly 90% of its surface was water,
当时的地表将近90%由水覆盖 - yet this was no blue planet.
但当时的地球并非蓝色 - Instead, vast clouds of methane had turned the atmosphere yellow.
恰恰相反 巨大的甲烷云将大气变为黄色 - On land, conditions were even worse.
陆地上的情况更糟 - Volcanoes had been erupting for millions of years.
火山已经喷发了数百万年
yet this was no blue planet. 但当时的地球并非蓝色
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