肠道与情绪之间那场无声的对话
We are used to thinking of the brain as the sole seat of our feelings. Yet a rapidly growing field of research suggests that our emotional lives are shaped, in part, by an unlikely organ: the gut, and the trillions of microbes that live within it. The old phrase gut feeling may be more literal than we ever imagined.
我们习惯把大脑当作情感唯一的居所。然而一个飞速发展的研究领域表明，我们的情绪生活在某种程度上，是由一个意想不到的器官塑造的——那就是肠道，以及生活在其中的数以万亿计的微生物。「直觉」（gut feeling，字面即「肠道的感觉」）这个老词，也许比我们想象的更加名副其实。
The gut is lined with an immense network of nerve cells, so extensive that some scientists call it a second brain. This system is in constant communication with the brain in the skull, sending far more signals upward than it receives in return. What happens in the digestive tract does not stay there; it ripples outward into how we feel and think.
肠道内壁布满了一张庞大的神经细胞网络，其规模之大，让一些科学家称之为「第二大脑」。这套系统与颅内的大脑不断沟通，向上发送的信号，远多于它所收到的回应。消化道里发生的事并不会止步于此，它会向外扩散，影响我们的感受与思考。
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