Fif
[医][=feedback inhibition factor]反馈抑制因子
🗣️ 情景例句
But I'm sure he has a few bags with him on the train.
不过我相信他在火车上还有几件行李的。
I've never read a more fascinating story.
我没有读过比这更令人着迷的故事。
My friend, Hugh, has always been fat, but things got so bad recently that he decided to go on a diet.
我的朋友休一直很胖，但是近来情况变得越发糟糕，以致他决定节食。