n.海贝；贝壳
She walk along the beach collect seashell. 她沿海滩收集海贝。
Small seashells were often used as a primitive kind of money. 小贝壳常被用作简单的货币。
Have you ever held a seashell to your ear and heard the roar of the ocean? 你曾把贝壳贴在耳边，倾听过海洋的呼啸吗?
n.海洋贝类
