Polyarylsulfone
[化] 聚芳砜
🗣️ 情景例句
May I ... may I help?
我能……我能帮上忙吗？
Where is immigration?
入境处在什么地方？
Please tell Mr Hu that I am working hard on my Chinese.
请告诉胡先生，说我正在努力学习汉语。