Bdf
[医][=B cell differentiation factor]B细胞分化因子
🗣️ 情景例句
and my math teacher's going to miss her.
而我的数学老师也会想念她。
She's gone; my heart's broken.
她弃我而去；我心碎无声。
You can join the line behind the clock tower.
你可以到钟楼后面排队。