This variation doesn't necessarily translate to observable, or phenotypic, differences among people, however.

然而，这种变异并不一定转化为人与人之间可观察到的或表型的差异。

The core microbiota is the same for all individuals while the variable microbiota is different between individuals in response to unique lifestyles and phenotypic and genotypic determinants.

所有人的核心微生物群都是相同的，而可变微生物群则随着每个人生活方式、表型和基因型等决定因素的不同而各有不同。