Uf
abbr. 脲甲醛树脂；超声频率（Ultrasonic Frequency）
🗣️ 情景例句
Are you used to eating western food yet?
你习惯吃西餐了吗？
What are you playing?
你正在玩什么？
our confidence in the curative properties of the bottle of medicine remains the same as theirs.
我们对瓶装药品疗效的信心仍与祖辈一样坚定。