Perfluorocyclopropane
全氟环丙烷
🗣️ 情景例句
Are you a citizen of the People's Republic of China?
你是中华人民共和国的公民吗？
We can't decide when to leave.
我们不能决定什么时候离开。
Was he absent from school last week?
上星期他没上学吧？