Mitragynine
帽柱碱
🗣️ 情景例句
Would you please make a record of all your foreign currencies?
请把你所带的外币登记一下，好吗？
I'll leave for London if I finish my work today.
如果我今天完成工作，我就会去伦敦。
Welcome back to school!
欢迎回校！