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单词 melatonin
释义

melatonin /me-lə-tōˈnin/

noun

A hormone secreted by the pineal gland during the hours of darkness that induces sleepiness and is thought to have useful application, eg in the treatment of jet lag

ORIGIN: Ety as for melanin, and serotonin
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更新时间:2024/12/23 14:37:02