Polybenzothiazole
[化] 聚苯并噻唑
🗣️ 情景例句
When do you think you can return with street performances?
你觉得何时可以带来街头表演艺术的摄影？
I asked him to pay, but he wouldn't.
我请他付账，但是他不肯。
Is it cold or warm in autumn?
秋季的天气是冷还是暖呢？