butt-jointed shell ring

例句：

1. 1.The butt-jointed shell ring is a unique feature of the animal's anatomy.
   但接合的壳环是该动物解剖学上的独特特征。
2. 2. The butt-jointed shell ring has been used in various cultural practices for centuries.
   但接合的壳环在几个世纪以来被用于各种文化实践。
3. 3. The butt-jointed shell ring is often found on the surface of marine organisms.
   但接合的壳环通常发现在海洋生物的表面。