名词
中文翻译：古生代的硬壳动物
同义词：
['ostracod', 'ostracod例句：1. The ostracoderm fossils found in the cave are of great scientific interest.（在洞穴中发现的古生代硬壳动物化石具有重要的科学价值。）2. Ostracoderms were a common type of marine life during the Cambrian period.（在寒武纪时期，硬壳动物是一种常见的海洋生物。）3. The ostracoderm shells are often used as decorative items in ancient civilizations.（古代文明中，硬壳动物的贝壳经常被用作装饰品。）']
例句：
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1. The ostracoderm fossils found in the cave are of great scientific interest.
在洞穴中发现的古生代硬壳动物化石具有重要的科学价值。
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2. Ostracoderms were a common type of marine life during the Cambrian period.
在寒武纪时期，硬壳动物是一种常见的海洋生物。
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3. The ostracoderm shells are often used as decorative items in ancient civilizations.
古代文明中，硬壳动物的贝壳经常被用作装饰品。