We succeed best with the little microbial bodies we have adapted to coexist with during evolution.

在进化过程中，我们适应的与之共存的微生物（组合）是最佳的。

Researchers at the University of Texas at Austin were interested in how complex characteristics arise during evolution.

得克萨斯大学奥斯汀分校的研究人员想知道进化过程中是如何产生复杂特征的。

And the reason is because dying was easy during evolution.

原因是因为在进化过程中死亡很容易。

And that sets that colonization march to a totally different tone, and simply because that's different to what we've adapted to during evolution, that might cause some health disadvantages for C-section-born babies later on.

这就给“殖民行军”设定了完全不同的基调，仅仅是因为剖腹产和我们 通过进化所适应的方式（顺产）不同，这就可能会在将来为剖腹产出生的婴儿带来一些健康劣势。