Polyepoxide
聚环氧化物
🗣️ 情景例句
While sitting on the bus I often meet interesting people.
乘车时，我经常碰到一些有趣的人。
Many people's feelings concur on the subject of freedom.
许多人的感情，在自由的问题上是一致的。
I haven't heard from her for a long time.
我好久没有她的消息了。