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1.The amphistomus was a large, amphibious creature that lived in lakes and rivers.
这种生物是一种大型的两栖动物，生活在湖泊和河流中。
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2.The amphistomus was a fascinating creature that had adapted to life in both land and water.
这种生物是一个令人着迷的生物，已经适应了在陆地和水中生活。
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3. The amphistomus was a rare species that was only found in certain parts of the world.
这种生物是一种稀有物种，只在世界的某个特定地区被发现。