Polyampholyte
聚两性电解质
🗣️ 情景例句
Where's the bag with the chicken salad sandwiches?
放鸡肉沙拉三明治的袋子在哪？
It's hopeless!
这下没指望了！
Today Ellis Island is a museum, showing the roots of America's new citizens, who came from all the corners of the earth.
今天，埃利斯岛成了一座博物馆，展示着来自世界各地的美国新公民的根源。