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Emerging from the sea, animals and plants
动物和植物在海洋中出现
went on to conquer the land and the air.
然后开始征服陆地和天空
Volcanoes had greated the conditions for a great evolutionary leap forward.
火山引发了伟大的进化飞跃
But the planet's powerful volcanoes have one further role to play in the story of life on earth.
可是强大的火山在地球生命故事中 还发挥着另外一种作用
A role that is still vital to the survival of complex life.
对人类这样的复杂生命的生存而言 依然是不可或缺的
It involves an amazing alliance, a partnership, between volcanoes and life
火山与一种生物达成的某种联盟 某种搭挡关系
which regulate the temperature of the planet.
在调节行星温度方面发挥着作用
It may be hard to believe,
或许很难相信
but working togther,volcanoes and life fine-tune the Earth's temperature
他们共同合作 通过控制释放到大气层中的二氧化碳的数量
by controlling the amount of carbon dioxide in the atmosphere.
精细地调控地球温度
This process begins in an unlikely place.
整个过程起始于一个不太可能的地点
The oceans,With tiny creatures called plankton.
在海洋里，有种微小的生物叫做浮游生物。
They maybe individually microscopic,
他们单独的个体十分微小
but they're so abundant that when they come together,
但是数量如此庞大当浮游生物汇聚在一起时，
they can be seen from space.
从太空都能看见。
