wedge shell

例句：

1. 1. The fossilized shell of a sea turtle is displayed in the museum.
   博物馆展出了一只海龟的化石壳。
2. 2.The wedge-shaped shell of the clam helps it to filter food from the water.
   蛤蜊的楔形壳体有助于它从水中过滤食物。
3. 3.The ancient marine creatures had wedge-shaped shells that protected them from predators.
   古代海洋生物拥有楔形壳体，以保护它们免受捕食者的伤害。