Polyfluocarbon
[化] 多氟烃
🗣️ 情景例句
That's good, I thought I was late.
太好了，我还以为我来迟了呢。
I'm sorry. I can't make it on Tuesday.
对不起，星期二我无法参加。
I have breakfast at 7:00 and then I go to school.
我七点吃早餐，然后去上学。