Developed by farmers over thousands of years... 四分之三的品种
Similar to the mother cell that is shared by all forms of life. 这些细胞和所有生物共享的母细胞相似
Was what to do with the surpluses engendered by modern agriculture. 如何处理现代农业带来的过剩盈余
Than by all previous generations of humanity. 其速度远超以往历代
Captured over millions of years by millions of plants... 是一亿多年前
Over three-quarters of them by hand. 其中超过四分之三仅靠人力
But the only energy at their disposal was provided by nature... 但是他们唯一可以支配的能量来源于自然
Four-billion-year-old legacy bequeathed by the earth. 遗留下来的惊人财产
United by customs and rituals that survive today. 依靠习性与惯例联合在一起 存活至今
They grew their shells by tapping into carbon from the atmosphere... 他们通过吸收溶解在海洋中的大气碳元素