在地球早期，整个星球上有无数的光合细菌在进行光合作用。
In Earth's early days, all over the planet countless photosynthetic bacteria performed photosynthesis.
对于需要远距离探测的生命化学，我们必须要找到一个通过表面生物进行光合作用的星球。
For the chemistry of life to be remotely detected, we must find a planet where photosynthesis is is being conducted by surface organisms.
在它的内部，光合反应中心收集太阳能，驱动水和空气中的二氧化碳形成糖，滋润并造就了我们的星球。
Within it, photosynthetic reaction-centres collect solar energy to drive the transformation of water and carbon dioxide in the air into sugars that nourish and build the plant.
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