shallow-spherical shell

例句：

1. 1. The researcher found the shallow-spherical shell on the beach.
   研究员在海滩上发现了浅球形壳体。
2. 2.The scientist discovered a new species of deep-sea creature with a shallow-spherical shell.
   科学家发现了一种深海底的新生物，它的壳是浅球形的。
3. 3.The ancient civilizations used shallow-spherical shells as currency for trade.
   古代文明用浅球形的贝壳作为贸易的货币。