Perfluoroalkanes
全氟烃类
🗣️ 情景例句
OK. We'll walk back to your office with you.
好吧 ，我们陪你走回你的办公室去。
A burnt child dreads the fire.
一朝被蛇咬，十年怕井绳。
Well done! Does that mean that your team is top of the league?
干的好。就是说你们球队是联赛冠军啦？