以下为句子列表：
英文: The researchers sequenced bacterial DNA from faecal samples taken from volunteers and discovered that those who were obese had a higher proportion of Firmicutes than lean people did.
中文: 研究人员从志愿者粪便样本中提取细菌的DNA，对其进行测序，而后发现肥胖人士体内壁厚菌门的微生物的比例比苗条人士要高。
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