Evolution is as firmly established a scientific fact as the roundness of the Earth.
进化是既成的科学事实，和地球是圆的一样稳固。
They say these genes, in fact, influence the evolution of an entire ecosystem.
他们说这些基因实际上影响整个生态系统的进化。
In fact, it's one of the simplest demonstrations we have of evolution at work.
事实上，这是十分简单的示范工作进程。
In fact, it's one of the simplest demonstrations we have of evolution at work.
事实上，这是十分简单的示范工作进程。
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