总鳍组鱼

例句：

1. 1. The total number of fish in the lake is estimated to be around 20,000.
   湖里总共有大约2万条鱼。
2. 2. The total cost of the project is $5 million.
   这个项目的总成本是500万美元。
3. 3. The total area covered by the forest is about 100 square kilometers.
   森林覆盖的总面积约为100平方公里。