Uf
abbr. 脲甲醛树脂；超声频率（Ultrasonic Frequency）
🗣️ 情景例句
I remember exactly.
我记得很清楚。
I am well aware of how risky this investment is.
我非常清楚这项投资有多大的风险。
They would have continued to struggle against economic odds and would have lived in obscurity.
这家人会继续为克服经济上的拮据而奋斗，并默默无闻地活下去。