Pmma
[化] 聚甲基丙烯酸甲酯
🗣️ 情景例句
She's still giving the toughest English history exams
她仍用最艰深的英国史试题考学生
The secret of wealth lieth in the letters SAVE.
节俭是致富的秘诀。
We want it to stay down the hole until we can lead it off in a controlled manner.
我们要让石油留在井下，直到我们能用一种有控制的方法把它引上来为止。