Polyanion
聚阴离子
🗣️ 情景例句
We were very young.
我们那时很年轻。
They had a baby last month.
他们上个月有了一个婴儿。
The drunk, however, seemed quite sure of himself.
当公牛逼近他时，他踉跄地住旁边一闪，牛扑空了。