Piga
abbr. polymeric immunoglobulin A 多聚免疫球蛋白A
🗣️ 情景例句
Lend-me your black-bag.
把你的黑包借给我吧。
He knows most who speaks least.
大智者寡于言。
however good and adequate they may be both as parents and as individuals,
不管家长的人品有多么好，作为父母又多么合格，