Background:The success of different species of ruminants in the colonization of a diverse range of environments is due t......

<正> 人肠道是厌氧生态系统,其中有产甲烷菌栖居着。在健康美国人中,优势产甲烷菌是史氏甲烷短杆菌(Methanobrevibacter smithii),......