And of course there's us right at the very top of the food chain, who hardly ever think about how much we really do depend on tiny bacteria.
And of course there's us right at the very top of the food chain, who hardly ever think about how much we really do depend on tiny bacteria.
而食物链的最顶端，当然就是我们--这些几乎从来没有考虑过自己事实上有多么依赖微小细菌的人类。