| 词汇 | melatonin |
| 释义 | mela·to·ninBrE /ˌmeləˈtəʊnɪn/ NAmE /ˌmeləˈtoʊnɪn/ noun [U ] (biology生物) a hormone that affects skin colour and is thought to be involved in controlling the reproductivecycle 褪黑(激)素 |
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