Khf
[医][=killer cell helper factor]杀伤细胞辅助因子
🗣️ 情景例句
Excuse me, ma'am.
对不起 夫人
I meet the boy whose aunt is a receptionist.
我遇到那个男孩的姑妈是接待员。
Don't crowd round him, said the gate keeper.
“不要围着他，”学校门卫说。