Polyvinylene
聚乙烯撑, 聚次亚乙烯
🗣️ 情景例句
What he lacks in experience he makes up for in enthusiasm.
他用热心工作来弥补其经验的不足。
I ought to talk to him.
我应该和他商讨。
What was the population of the more developed countries in 1950?
1950年较发达国家的人口是多少？