anocutaneous line

例句：

1. 1. The skin of the anocutaneous part is very thin and smooth.
   无毛部分的皮肤非常薄且光滑。
2. 2.This region is known for its anocutaneous plants.
   该地区以其无毛植物而闻名。
3. 3. The scientist studied the anocutaneous tissue in order to understand its function.
   科学家研究了无毛组织，以了解其功能。