Bff
abbr. 永远最好的朋友（Best Friend Forever）
🗣️ 情景例句
What is your favorite sport?
你最喜欢的运动是什么？
If you have any questions on the details， feel free to ask.
如果对某些细节有意见的话，请提出来。
When the instrument is situated at more than 700 miles from the earthquake centre,
如果把这种仪器安装在距震源700多英里远的地方，