Uba
abbr. undenatured bacterial antigen 非变性的细菌抗原
🗣️ 情景例句
It sounds so nice.
很好听。
I thought about going to my sister's. How about you?
我想去姐姐家玩，你呢？
No, I'm not. I'm eleven. Are you twelve?
不，我不是10岁，我11岁了。你12岁吗？