Hydra

(noun.) small tubular solitary freshwater hydrozoan polyp.

(noun.) 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'.

(noun.) a long faint constellation in the southern hemisphere near the equator stretching between Virgo and Cancer.

(noun.) (Greek mythology) monster with nine heads; when struck off each head was replaced by two new ones; 'Hydra was slain by Hercules'.

校对:苏西

• The diseases of a State are like the heads of a hydra; they multiply when they are cut off. 柏拉图. 理想国.
• In the Hydra, the animal may be turned inside out, and the exterior surface will then digest and the stomach respire. 查尔斯·达尔文. 物种起源.
• Like the hydra, it grows new heads, everywhere. 沃尔特·李普曼. 政治序论.

手打:威特