The ancestors of plants were photosynthetic single-celled organisms that gave rise to plants presumably lacked true roots, stems, leaves, and complex reproductive structures such as flowers.
植物的祖先是进行光合作用的单细胞生物,由此产生的植物可能缺乏真正的根、茎、叶和复杂的生殖结构,如花朵。
Nonetheless, there are indications that single-celled organisms can learn.
尽管如此,仍有迹象表明单细胞有机体可以学习。
But they don't beat single-celled organisms that emerged about 3.4 billion years ago.
但是没有34亿年前出现的单细胞生物的历史久。
应用推荐