Metacetaldehyde
[化] 变乙醛; 聚乙醛
🗣️ 情景例句
I've been thinking about it for weeks now.
为这事我想了几个星期。
The classes are interesting, and the teachers are good.
那些课很有趣，老师又好。
Do you have any comment on this clause.
你对这一条款有何看法？