UF

例句：

1. 1. UF is a word that means "unfortunately" in English.
   UF 是英语中表示“不幸地”的词汇。
2. 2.UF is also used to describe something that is not good or desirable.
   UF 也用来描述某物不好或不受欢迎。
3. 3.UF can be used as an adjective or adverb, depending on the context.
   UF 可以用作形容词或副词，取决于上下文。