Fluorgypsum
氟石膏
??? 情景例句
Don't lose sleep over it.
別因為這事兒睡不著覺。
Who would you name as the greatest poet of our time?
你認為當代最偉大的詩人是誰？
Fine, thanks. Oh, That's the bell. Everyone is going into class, we'd better go too.
很好，謝謝。啊，鈴響了。大家都去上課。我們最好也去。