Polybenzoxadiazole
[化] 聚苯并┭二唑
🗣️ 情景例句
Please don't do it without asking.
未经允许请不要那么做。
My brother wants to learn how to swim.
我的兄弟要去学游泳。
At present, they are visiting all parts of the country.
目前他们正在全国各地巡回演出，