fin tube wall

例句：

1. 1. The fish's fin tube wall is covered in scales.
   这条鱼的鳍管壁覆盖着鳞片。
2. 2.The scientist used a microscope to examine the fin tube wall of the shark.
   科学家用显微镜检查了鲨鱼的鳍管壁。
3. 3.The fin tube wall of the shark is very strong and flexible.
   鲨鱼的鳍管壁非常强壮且灵活。