Piga
abbr. polymeric immunoglobulin A 多聚免疫球蛋白A
🗣️ 情景例句
After Richard was born.
等生下Richard之后。
It's nice to be sitting here with you.
在这里陪你坐着是非常愉快的。[动词不定式的进行时]
I sure am.
嗯，可以签了