Coptisine
黄连碱
🗣️ 情景例句
I can only stay a few minutes.
我只能停留几分钟。
We were pleased to hear from your letter of 6 August that you were impressed with our selection of toys.
我们很高兴收到你方8月6日来函得知你方对我们的玩具非常感兴趣。
And when do you take your next exams?
还有，你什么时候参加下次考试？