Alkenes
(alkene 的复数) n.[化]烯烃,链烯
🗣️ 情景例句
Have a nice weekend.
周末快乐。
Mr. President, ladies and gentlemen, and all the distinguished guests.
主席先生，女生们先生们，各位贵宾们。
Yes, said Miss Yang.they're on that shelf over there.
“有，”杨小姐说，“就在那边的那个书架上。”