Positive emotional bonding enhance positive emotions, lowers stress hormones, enhances immune function, and increases dopamine and serotonin
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enhances immune function
增强免疫功能
以上为机器翻译结果，长、整句建议使用 人工翻译 。
The broiler chickens fed by the feed greatly enhances immune function, greatly enhances the immunity against the disease and substantially improves the survival rate.
采用该种饲料饲喂的肉鸡，大大提高免疫机能，对疾病的抵抗力大大增强，成活率也得到显著改善。
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