melatonin
US /mel.əˈtoʊ.nɪn/
UK /mel.əˈtəʊ.nɪn/
名词
褪黑素
a hormone that is naturally produced by the pineal gland in the brain and helps regulate sleep-wake cycles
示例:
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Many people take melatonin supplements to help with jet lag.
许多人服用褪黑素补充剂来帮助缓解时差。
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The body's production of melatonin increases in the dark.
身体在黑暗中会增加褪黑素的产生。