Understanding this cycle is important, not only because it sustains life on Earth, but also because it is bound up with the rate of global warming.

理解这种循环很重要，不仅因为碳循环维持地球上的生命，而且因为它对于全球变暖的速度有密切关系。

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Understanding this cycle is important, both because it sustains life on Earth and because it is bound up with the rate of global warming.

理解这种循环很重要，不仅因为碳循环维持地球上的生命，而且因为它对于全球变暖的速度有密切关系。

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But first, a warning: On the way to understanding how your life will get better, you'll have to read about some technical, fairly arcane topics.

先要小小警告一声：想要明白如何能让你的生活更美好，你会读到一些技术性的，甚至有点深奥的话题。

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While fewer species live in the ocean than on land, marine life represents much older evolutionary lineages that are fundamental to our understanding of life on Earth, Appeltans says.

ENGADGET: Scientists estimate at least one third of marine species remain unknown to humans

We had an instant understanding of many of our shared views on life just from that one initial interaction.

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This discovery, made just three years after new technology first enabled Alvin to reach these depths, changed our understanding of how life can function here on Earth, and opened entirely new fields of research.

CNN: Probing the ocean's undiscovered depths