Uf
abbr. 脲甲醛树脂；超声频率（Ultrasonic Frequency）
🗣️ 情景例句
Are you married or single?
你结婚了还是单身？
He studied quite a lot.
他非常用功。
Which speech are you going to listen to this afternoon?
今天下午你准备去听哪个报告？