Polycation
聚阳离子
🗣️ 情景例句
There is something I want to ask you about clause 8.
我想问你有关第八条款的事。
Familiar paths and old friends are the best.
熟路好遵循，老友最可珍。
The dentist is very busy at the moment.
牙科医生这会儿很忙。