Cationite
阳离子交换剂
🗣️ 情景例句
Oh. I have the key. Grandpa sent it to me.
啊。钥匙在这里。爷爷寄来给我的。
Do you want to change before the banquet?
宴会前你想换衣服吗？
Let's think carefully, I replied.
“让我们仔细想一想，”我答道。