名词
中文翻译：水螅
同义词：
['hydroid', 'hydrostalker']
例句：
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1. The hydropolyp was found in the ocean floor, where it lives in harmony with its environment.
这种水螅在海底被发现，它与环境和谐共处。
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2. The hydropolyp has a unique ability to sense vibrations from nearby predators and avoid them.
这种水螅具有从附近捕食者那里感知振动并避开它们的特殊能力。
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3. Due to its bioluminescent properties, the hydropolyp is often used as a luminous marker for underwater exploration.
由于其生物发光特性，水螅常被用作水下探索的发光标记。