FUO

例句：

1. 1. The futuristic city is a symbol of the future.
   这个未来城市是未来的象征。
2. 2. Fuzzy logic is used in many applications, such as robotics and artificial intelligence.
   模糊逻辑被广泛应用于许多领域，如机器人技术和人工智能。
3. 3. Fuzzy sets are a fundamental concept in set theory.
   模糊集是集合论中的一个基本概念。