Polyaddition
加(成)聚(合)作用
🔁 扩展释义
【化】 聚加成反应; 逐步加成聚合
🗣️ 情景例句
You can see many posters that are put up before the movie opens.
每部电影首映前你都会看到铺天盖地的海报。
Happens all the time.
常有的事。
One day she came into my room laughing happily.
有一天，她开心地笑着来到我的房间。