Polyethylenes
(polyethylene 的復數) n. 聚乙烯\\n[化] 聚乙烯
??? 情景例句
They're coming by at six tomorrow morning,
他們明天早晨六點鐘過來，
The worth of a thing is best known by the want of it.
物以稀為貴。
I must see the dentist now,nurse.
我必須現在就見牙科醫生，護士。