Polyvinylene
聚乙烯撑, 聚次亚乙烯
🗣️ 情景例句
What was your speciality?
你学的是什么专业？
No. I have been away on vacation.
是呀，我休假去了。
said Jim. Somebody or something took it. We won't go until we get it back again!
吉姆说，“什么人或者什么东西把它拿走了。不把它找回来我们就不走！”