helodrilus

例句：

1. 1. He found a conch shell on the beach and decided to keep it as a treasure.
   他在沙滩上发现了一个海螺壳，决定把它当作宝贝收藏。
2. 2. The oyster is an important food source for many people.
   牡蛎是许多人的重要食物来源。
3. 3. Clams are commonly used in cooking due to their rich flavor and texture.
   由于其丰富的口感和质地，蛤蜊常用于烹饪。