Polymethacrylate
聚甲基丙烯酸酯
🗣️ 情景例句
Do you have any friends in the import or export field?
你有在进出口领域工作的朋友吗？
As the touchstone tries gold,so gold tries man.
试金之石可试金，正如黄金能试人。
The door is opened by his son, Gary.
开门的是他的儿子加里。