Polymethacrylonitrile
[化] 聚甲基丙烯腈
🗣️ 情景例句
And there's so much to do.
而且这里总是有许多事可做。
We are sure to defeat them.
我们一定会打败他们。
A run-down watch is still a watch and can be rewound.
手表停了依然是只手表，还可以重上好发条。