Ketopyrrolidine
吡咯烷酮, α, γ-丁内酰胺
🗣️ 情景例句
Lots of movie houses, and the theater.
很多电影院 还有剧院。
Do you often play bridge on Saturday?
你常常在星期六玩桥牌吗？
Mr Brain has just heard Zheng Jie playing the piano in a concert.
布雷恩先生刚听了郑杰在音乐会上的钢琴演奏。