Pfcs
abbr. 全氟化碳；全氟代烃类
🗣️ 情景例句
without studying these building plans more carefully.
在没有仔细研究这些建筑图的情况下。
How do I look?
我看上去怎样？
Is there anything else I can do for you?
还有什么事我可以帮忙吗？