Polymerid
[医] 聚合物, 聚合体
🗣️ 情景例句
Keeping busy. Yourself?
一直很忙，你呢？
Feed a pig and you'll have a hog.
种瓜得瓜，种豆得豆。
Why does aperson standing in a bus or train tend to fall when a sudden start is made?
一个人站在公共汽车或火车上，当车突然开动时，他为什么会倾倒呢？