Fif
[医][=feedback inhibition factor]反馈抑制因子
🗣️ 情景例句
English is important for those who wish to do international trade.
英语对于那些想做国际贸易的人来说太重要了。
What brings you to Beijing?
什么风把你吹到北京来的？
My parents were visiting relatives, and my grandparents had decided to spend the day at home.
我父母走亲戚去了，祖父母打算那天在家呆着。