Pmma
[化] 聚甲基丙烯酸甲酯
🗣️ 情景例句
Many business people turn off their pagers and cell phones during their leisure time.
许多商人在他们的休息时间里都把传呼机和移动电话关掉。
Nothing venture, nothing win (or have or gain).
不入虎穴，焉得虎子。
He could not find his fifty pence piece anywhere, and what is more,
但他摸了半天也没找到那50便士硬币，