Polyacrylonitrile
n. [化]聚丙烯腈
🗣️ 情景例句
You'll be OK.
你不会有问题的。
What were you doing when I called you on the telephone?
当我打电话给了你时，你正在做什么？
Why do you have to work so hard?
为什么你要这样卖力地工作呢？