Polyarylsulfone
[化] 聚芳砜
🗣️ 情景例句
Are you traveling alone or whth a friend?
你是一个人旅行还是结伴旅游？
Which of your arms is sore?
你哪个手臂酸呀？
Let's ask this policeman. He may know.
咱们问问这位警察。他可能知道。