- With leaves only one cell thick,
叶子只有一层细胞 - they couldn't grow upwards,
它们无法向上生长 - but could spread out.
但可以蔓延开来 - Reproducing faster than lichen,
它们的繁殖速度比地衣快 - they soon carpeted the land,
很快就铺满陆地 - which they ruled undisturbed for the next 40 million years.
在之后的4000万年 不受滋扰地统治着陆地 - But a green revolution was coming...
但是一场绿色革命即将到来