海扇壳

例句：

1. 1. The seashells are scattered on the beach.
   贝壳散落在海滩上。
2. 2. The bivalves were harvested from the ocean floor.
   双壳类动物从海底被采集。
3. 3. Clams are a popular seafood dish in many coastal regions.
   蛤蜊是许多沿海地区的流行海鲜菜肴。