名词
中文翻译：多足动物
同义词：
['polypod', 'polypode', 'hydra', 'hydroid']
例句：
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1. The hydra is a fascinating creature that can grow to enormous sizes.
水螅是一种令人着迷的生物，可以长到非常大的尺寸。
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2. The polypode has been used in traditional Chinese medicine for centuries.
多足动物在中国传统医学中被使用了几个世纪。
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3. Hydras are known for their ability to reproduce rapidly and adapt to new environments.
海螅因其快速繁殖和适应新环境的能力而闻名。