Polymethacrylonitrile
[化] 聚甲基丙烯腈
🗣️ 情景例句
How fresh are these vegetables?
这些蔬菜有多新鲜？
So let us all welcome him to the podium.
让我们欢迎琼斯先生上台演讲。
At night, when you really wish to go to sleep, you rarely manage to do so.
到了夜晚，你真想睡了，却很难入睡。