Difluorinated
二氟化的
🗣️ 情景例句
The Post Office aims to improve its quality of service.
邮局锐意改善服务质量。
We are accustomed to working hard.
我们习惯于努力工作。
Half a pound of coffee.A quarter of pound of tea.And a tin of tobacco.
半磅咖啡、1/4 磅茶叶和一听烟丝。