Melatonin
[化] 褪黑激素; N-乙酰-5-甲氧基色胺
🗣️ 情景例句
if he spends less on the cultural programs.
假如他在这文化活动上减少开支的话。
You won't believe it,but it was really cheap.
你不会相信的，但这条裤子确实很便宜。
I hope nothing is wrong.
我希望一切顺利。