Polyfluorohydrocarbon
[化] 多氟烃; 多氟代烃
🗣️ 情景例句
I'll watch him, Dad.
我会注意他的， 爸爸。
There has been a great mistake.
发生重大的错误了。
Not at all! Please sit down, Mr. Green. Would you like a cup of tea?
没关系！请坐，格林先生。你喝茶吗？