Uf
abbr. 脲甲醛树脂；超声频率（Ultrasonic Frequency）
🗣️ 情景例句
I was quite surprised when I read in your letter that you had decided not to finish your studies at the university.
当我在你的信中看到你已决定终止大学学业时感到很是惊讶。
May I see a timetable?
我可以看时刻表吗？
He usually takes a short walk in the evenings and is always home by seven o'clock.
傍晚常常出去溜达一会儿，并且总是在7点钟以前回来。