鱼鸟

例句：

1. 1. The fish in the lake are swimming around happily.
   湖里的鱼在快乐地游来游去。
2. 2. The bird flew away as soon as it saw the hunter.
   鸟儿一看到猎人就飞走了。
3. 3. The aquatic creature is an important part of the ecosystem.
   这种水生生物是生态系统中重要的组成部分。