名词
中文翻译：Unknown
同义词：
['echinoderm', 'echinodermata', 'protochordate', 'protochordates']
例句：
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1. The eurypteroid is a fascinating creature that has been studied for centuries.
海马是一种令人着迷的生物，几个世纪以来一直受到研究。
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2.Eurypteroids are found in various marine environments and play important roles in ecosystems.
海马分布在各种海洋环境中，对生态系统起着重要的作用。
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3. Scientists have discovered new species of eurypteroids, which could have implications for marine biology research.
科学家发现了新的海马物种，这可能对海洋生物学的研究产生影响。