Pfcs
abbr. 全氟化碳；全氟代烃类
🗣️ 情景例句
and ask her to come by and talk about it.
请她过来谈谈这件事。
They that (or who) live longest see most.
活得最长，见识最广。
We are all very excited and are looking forward to the Olympic Games because they have never been held before in this country.
我们都非常激动，盼望着奥运会的到来，因为在这个国家里还从未举办过奥运会。