Polymethacrylate
聚甲基丙烯酸酯
🗣️ 情景例句
Philip, I took Michelle to a school play
Philip,我带Michelle看过学校演出的
When did you know the answer?
你什么时候知道答案？
He and his staff began throwing furniture out of the window.
他与店员动手向窗外投掷