Bdf
[医][=B cell differentiation factor]B细胞分化因子
🗣️ 情景例句
If we're all prepared to recycle paper, thousands of trees could be saved every day.
如果纸能被循环利用，那么每天千千万万的树木就可得以挽救。
You can count on me.
你可以放心。
What you need is just rest.
你需要的就是休息。