Polychlorparaffin
多氯化石蜡
🗣️ 情景例句
Tonight's a problem. What about tomorrow night?
今晚不行，明晚怎样？
All work and no play makes Jack a dull boy.
只工作，不玩耍，聪明小孩也变傻。
The dentist is very busy at the moment.
牙科医生这会儿很忙。