喝一杯牛奶。牛奶里含有色氨酸，经过新陈代谢后可以转换成提高情绪的血清素。
Drink a glass of milk. It contains tryptophan, which as it is metabolized is converted to mood-boosting serotonin.
喝一杯牛奶。牛奶里含有色氨酸，经过新陈代谢后可以转换成提高情绪的血清素。
Drink a glass of milk. It contains tryptophan, which as it is metabolized is converted to mood-boosting serotonin.
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