Polymethylene
n. [化]聚亚甲基
🗣️ 情景例句
It's no use crying over spilt milk. What's done cannot be undone.
覆水难收。
Was I supposed to help you today?
今天我想帮你忙。
' I continued driving and after some time,the examiner tapped loudly,
”我继续往前开着。过了一会儿，主考人砰砰地敲了起来。