名词
中文翻译：水螅
同义词：
['hydra', 'hydrozoan']
例句：
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1.Scytonema hyalina 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 hydra has been used in traditional medicine for centuries as a source of medicinal compounds.
水螅在传统医学中被使用了几个世纪，作为药物化合物的来源。
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3. Hydrozoans are another group of marine organisms that are known for their ability to adapt to various environments.
水螅是另一种海洋生物，以其适应各种环境的能力而闻名。