hydra

◎ 单词释义

n.（希腊神话中的）九头蛇；难以根除之祸害；水螅

n.长蛇星座

名词复数: hydras

n.(名词)

难以根除之祸害

【希神】九头蛇

水蛇

难以一下根绝的祸害

大患

不断产生困难的问题

【动】水螅

【天】长蛇座

难于根除的祸患

长蛇（星）座

Noun:

(Greek mythology) monster with nine heads; when struck off each head was replaced by two new ones;

"Hydra was slain by Hercules"


a long faint constellation in the southern hemisphere near the equator stretching between Virgo and Cancer

trouble that cannot be overcome by a single effort because of its many aspects or its persistent and pervasive quality;

"we may be facing a hydra that defies any easy solution"


small tubular solitary freshwater hydrozoan polyp

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