Bdf
[医][=B cell differentiation factor]B细胞分化因子
🗣️ 情景例句
I know it.
我知道。
Rome was not built in a day.
罗马并非一日可建成；坚持必成。
The plane was late and detectives were waiting at the airport all morning.
飞机误点了，侦探们在机场等了整整一上午。