Pmma
[化] 聚甲基丙烯酸甲酯
🗣️ 情景例句
How much do stamps cost?
邮票多少钱？
I see your point, but I still can't agree with you.
我明白你的意思，但我仍然不能同意你。
suggested an idea on which he had been working for many years to the British Government and industrial circles.
他向英国政府和工业界提出了他研究多年的一项计划。