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serotonin
seroʊtnɪn ˌsɛrəˈtəʊnɪn ˌsɪrəˈtoʊnɪn ˌ sɛrəˈtoʊnɪn
N-UNCOUNT 血清素 Serotonin is a chemical produced naturally in your brain that affects the way you feel, for example making you feel happier, calmer, or less hungry. 血清素
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