It is a normal element cycled around in the earth and my science, which is looking back in time, is saying we have had a planet that has been a green, warm wet planet 80 per cent of the time.
这是地球上一个正常的元素循环，我的科学沿时间回溯，表明我们的地球80%的时间曾是一个绿色、温暖、潮湿的行星。
It is a normal element cycled around in the earth and my science, which is looking back in time, is saying we have had a planet that has been a green, warm wet planet 80 per cent of the time.
这是地球上一个正常的元素循环，我的科学沿时间回溯，表明我们的地球80%的时间曾是一个绿色、温暖、潮湿的行星。
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