frenquel

例句：

1. 1.He is a fanatic in his field of expertise.
   他在其专业领域是个狂热者。
2. 2.She was a zealot for environmental conservation.
   她对环境保护是狂热的信徒。
3. 3.He is an enthusiast for classical music.
   他对古典音乐有狂热的兴趣。