Polybenzimidazole
聚苯并咪唑
🗣️ 情景例句
He sees her often but doesn't want to get too involved.
他常与她来往，但不愿用情太深。
Who is the author of this novel?
这篇小说的作者是谁？
What's up? What's up? someone called.
“什么事？什么事？”有人叫着。