Cationite
阳离子交换剂
🗣️ 情景例句
Don't waste your school years, son, they can determine your future.
孩子，别荒废你的学业，它们对你的未来有决定作用。
Why was only he exempted from work?
为什么只有他不必工作呢？
Alfred the Great acted his own spy,
阿尔弗雷德大帝曾亲自充当间谍。