Unf
abbr. 美制细牙（unified national fine）；未溶化的（unfuzed）
🗣️ 情景例句
You should save some money in case of urgent need.
你应该存点钱以备不时之需。
I used to wake up early and get up at 7 o'clock.
我过去常早醒来并且在7点钟起床。
The doctor advised me to give up smoking.
医生建议我戒烟。