Parthenicine
银胶菊碱
🗣️ 情景例句
My son must have put you to a lot of trouble.
我儿子一定给你带来不少麻烦。
I lack words, with which to express my thanks.
我无法以言语来表达我的感激之情。
At last I hung up the receiver.
我终于挂上了话筒。