Uba
abbr. undenatured bacterial antigen 非变性的细菌抗原
🗣️ 情景例句
I'll hang it in my office. But I feel bad I didn't get you anything.
我要把它挂在办公室。不过，真不好意思，我什么也没送你。
Don't worry about it.
别担心。
He can't write very much on a card, Mum.
在明信片上他写不了很多，妈妈。