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
Have you filled in the baggage declaration?
行李申请单填好了吗？
Observation is the best teacher.
观察为良师。
It was made in Germany in 1681.
是1681年德国造的。