相反地，非洲的这组孩子肠胃菌群中更多的是与消瘦相关的细菌，并且有更高比例的被认为可以产生有益化学物质短链脂肪酸(SCFAs)的细菌。

In contrast, African children had lots of bacterial species associated with leanness, and a higher proportion of microbes known to produce beneficial chemicals called short-chain fatty acids (SCFAs).

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