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hydra-的英文翻译是什么意思，词典释义与在线翻译：
英英释义
名词 hydra:
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(Greek mythology) monster with nine heads; when struck off each head was replaced by two new ones
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a long faint constellation in the southern hemisphere near the equator stretching between Virgo and Cancer
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trouble that cannot be overcome by a single effort because of its many aspects or its persistent and pervasive quality
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small tubular solitary freshwater hydrozoan polyp
