Melatonin
[化] 褪黑激素; N-乙酰-5-甲氧基色胺
🗣️ 情景例句
Are we picking him up at the station?
我们要去车站接他吗？
For ￡300 to London, the commiossion is 3, please.
汇款300英镑到伦敦，费用为3英镑。
They did not pay any attention.
他们却毫不理会。