形容词
中文翻译：无脊椎的
同义词：
['apodous', 'apoditic', 'apoditic']
例句：
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1.The gymnosperms are the earliest known plants that lack vascular tissues.
无花果是已知最早的没有维管组织的植物。
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2.The gymnosperms were once common in the oceans but have now mostly disappeared.
无花果曾经在海洋中很常见，但现在大多数已经消失了。
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3. The gymnosperms are often found in ancient rocks and fossils.
无花果通常被发现在古代岩石和化石中。