Lactone
n. [化] 内酯
🗣️ 情景例句
Oh! Hi, Grandpa. Yes, of course, I am, but my mind isn't.
噢， 嗨， 爷爷。是的， 当然， 我准备好了， 但是有点心事。
The more we study, the more we discover our ignorance.
学得越多，就越发觉自己无知。
Well, next time you'd better take my advice!
好啦，下次你最好还是听从我的劝告！