Sfn
abbr. Sound Field Nonunifornity （声场不均匀度）
🗣️ 情景例句
My account number is ...
我户头号码是…
Please give my best regards to your parents.
请代我致最高的敬意，向你的父母问好。
He will soon be working in an office.
不久就要坐办公室里工作了。