Polyfluorocarbon
[化] 多氟烃; 多氟代烃
🗣️ 情景例句
They mentioned you as a good source of information.
他们说你消息灵通。
When you're down and blue, go to a comedy.
你灰心丧气的时候，去看看喜剧。
a moment later, he ran after me and thrust the pen into my hands.
一会儿，他突然从后追了上来，把笔塞到我手里。