Polyhalide
多卤化物
🗣️ 情景例句
It's certainly a pleasure to meet you.
认识你真是我的荣幸。
Is that so?
是这样子的吗？
Experiments have proved that children can be instructed in swimming at a very early age.
实验证明，儿童在很小的时候就可以开始学习游泳。