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English

However, seashells are not the only kind of shells; in various habitats, there are shells from freshwater animals such as freshwater mussels and freshwater snails, and shells of land snails.

Chinese

然而,海贝壳不是唯一的一种贝壳;在不同的生态环境中,淡水中也可以找到贝壳,如淡水蚌和田螺 。