Polyfoam
泡沫塑料
🗣️ 情景例句
What's wrong with wanting to be on the school board?
想进入联合校董会有什么错？
The whole class is in a heated discussion.
全班同学正在热烈讨论。
A recent article in a weekly newspaper, for instance,
例如，最近一家周报刊登了一篇文章，