名词
中文翻译：水母
同义词：
['hydroid', 'hydrozoan', 'hydra', 'polyp']
例句：
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1. Cnidarians are fascinating creatures that live in the ocean.
水母是一类令人着迷的海洋生物。
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2. The cnidarians were found to have a unique ability to sense vibrations.
研究发现，水母具有独特的感知振动的能力。
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3. The cnidarians were found to have a unique ability to sense vibrations.
研究发现，水母具有独特的感知振动的能力。