1. | 许德拉,多头蛇(砍去一个头即长出新头,后为大力神赫拉克勒斯所杀)a snake with several heads. As one head was cut off, another one grew. In the end it was killed by Hercules. |
2. | 棘手的复杂事物;难以根绝的祸患a thing that is very difficult to deal with, because it continues for a long time or because it has many different aspects |
3. | 水螅an extremely small water creature with a tube-shaped body and tentacles around its mouth |