Aicf
abbr. auto-immune complement fixation 自动免疫补体结合
🗣️ 情景例句
I'll be in the front office all day.
我整天都在总办公室。
It is too late to shut the stalbe door when the steed is stolen.
失马锁厩，为时已晚；贼去关门，为时已迟。
Excuse me.
对不起。