- n. （希腊神话中的）九头蛇；难以根除之祸害；水螅
- n. 长蛇星座
(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
- This beast is Hydra, it has terrorized my seas for far too long.
- That's weird, that rope comes out of a hydra neck? I can't even reach it!
- We may be facing a hydra that defies any easy solution.
- The bodies of the hydra and sea anemone can produce buds.
- hydra （希腊神话中的）九头...
They are the hydra assailants which return with every hour.出自： M. Robinson
- snake 蛇