Bdf
[医][=B cell differentiation factor]B细胞分化因子
🗣️ 情景例句
I'm glad I ran into you. Where have you been hiding lately?
我很高兴碰见你，你躲到哪里去了？
Whom God would ruin, he first deprives of reason.
伤天害理，天诛地灭。
I saw him playing football on the playground.
我看见他在操场上踢足球。