Bdf
[医][=B cell differentiation factor]B细胞分化因子
🗣️ 情景例句
OK.
好。
Please don't let the dog come in the house.
请别让狗进到屋子里。
Though we all got out to examine the fissure, he remained in the car.
我们纷纷下车察看那个大裂缝，他却呆在车上。