Polymethacrylate
聚甲基丙烯酸酯
🗣️ 情景例句
Oh, that's a very good school.
哦， 那是个好学校。
Do you ever do exercises on Saturday?
你曾经在星期六做练习吗？
They will also be building new roads and a special railway line.
他们还将修筑一些新的道路和一条铁路专线。