结果正常小鼠体重增加，无菌小鼠依然保持体重不变。
The normal mice gained weight; the germ - free mice stayed lean.
研究中使用了通过特殊饲养技术获得的无菌小鼠。这种小鼠可以接受人类的肠道菌类在其肠道中繁殖。
Researchers started with mice that were specially bred to be germ-free - with no gut microbiota of their own - and to be able to nurture human gut microbiota instead.
也可以吧这些微生物与其他微生物群落结合，早无菌小鼠身上建立模型，从而可产生一些简单的人类肠道菌群。
Then, these microbes can be reunited with other members of a microbial community in germ-free mice to create more simplified models of human gut communities.
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