Polyampholyte
聚两性电解质
🗣️ 情景例句
Speaking of mother and of father
谈到孩子的爸， 孩子的妈，
I ate mushroom soup for lunch yesterday.
我昨天晚饭吃的是冬菇汤。
The order number wasn't anywhere on any of the boxes.
所有的条子都没打上订货号码啊！