Pfoa
[医][=Perfluorooctanoic acid]全氟辛酸
🗣️ 情景例句
Find a productive hobby, and see if you can learn something.
找一个具有意义的爱好，看你能否从中学到什么。
Come in,please.
请进！
How long has Kate been at her school?
凯特进校学习有多长时间了？