Bcf
[医][=bacterial chemotactic factor]细菌趋化性因子
🗣️ 情景例句
78 percent of black high-school graduates are unemployed.
百分之四十八的黑人高中毕业生失业。
I remember the girl whose father earns $ 300 a day.
我记得那个女孩的父亲一天赚三百元。
Sure enough, a policeman arrived on the scene and politely asked the workmen to go away.
果然，警察来了，不礼貌地请工人离开此地；