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Gut instinct 肠道反应 Tantalising evidence that intestinal bacteria can influence mood 诱人的证据表明，肠道细菌可以影响人的情绪 A GOOD way to make yourself unpopular at dinner parties is to point out that a typicalperson is, from a microbiologist s perspective, a walking, talking Petri dish. 一个让你自己在晚宴上不受欢迎的好方式就是，从微生物学家的角度指出，一位有代表性的人就是一个会走动并会说话的皮氏培养皿。 An extraordinary profusion of microscopic critters inhabit every crack and crevice ofthe typical human, so many that they probably outnumber the cells of the body upon andwithin which they dwell. 每位有代表性的人的裂纹和缝隙里生活着无数的微小生物，它们的数目如此之多可能超过它们所依靠并栖息的人体细胞。 Happily, these microbes are mostly harmless. 幸运地是，这些微生物大部分都是无害的。 Some of them, particularly those that live in the gut, are positively beneficial, helping withdigestion and keeping the intestines in good working order. 其中一些，特别是那些生活在消化道里的微生物，实际上是有益的，不仅有助于消化还保持肠道良好的工作秩序。 | 
