niú / de / liú / wèi / lǐ / shēng / huó / zhe / xǔ / duō / bāng / zhù / xiāo / huà / de / wēi / shēng / wù牛的瘤胃里生活着许多帮助消化的微生物。Many microorganisms that aid digestion live in a cow's rumen.