Milk contains tryptophan, an essential amino acid that is a natural dietary sleep inducer.
牛奶中的色氨酸是一种天然促进睡眠的人体必需氨基酸。
Milk contains tryptophan, the amino acids that have a sedative effect and calcium that helps the brain use tryptophan.
牛奶中含有色氨酸，具有镇静效果的氨基酸，以及可以有助于大脑利用色氨酸的钙。
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。
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