名词
中文翻译：海龟
同义词：
['turtle', 'sea turtle例句：1. The nautilus shell is a popular tourist attraction.（海龟壳是受欢迎的旅游景点。）']
例句：
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1. The nautilus shell is a popular tourist attraction.
海龟壳是受欢迎的旅游景点。
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2. The nautilus is a fascinating creature that has been around for millions of years.
海龟是一种令人着迷的生物，已经存在了数百万年。
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3. The nautilus is a symbol of the ocean's rich biodiversity.
海龟象征着海洋丰富的生物多样性。