adipose fin

例句：

1. 1. The fish swims with its adipose fin sticking out of the water.
   这条鱼用它的脂肪鳍在水面上划水。
2. 2. The scientist studied the adipose fin to understand how it works.
   科学家研究脂肪鳍来了解它如何工作。
3. 3. The adipose fin is an important part of the fish's body structure.
   脂肪鳍是鱼身体结构的一个重要部分。