Halon
卤化烷（常用以灭火）
🗣️ 情景例句
I intend to major in economics in college.
我想在大学里主修经济学。
Do you live down the street?
你在街尾居住吗？
Excuse me. Where's the nearest post office, please?
请问，最近的邮局在哪儿？