Hydra
01
水螅, 淡水息肉
a freshwater polyp with a cylindrical body and tentacles
语法信息
有生性状态
动物
形态构成
简单词
可数
复数形式
hydras
例子
In the lab, students conducted experiments to study the feeding behavior of the hydra.
在实验室里，学生们进行了实验来研究水螅的摄食行为。
02
九头蛇, 持续的问题
trouble that cannot be overcome by a single effort because of its many aspects or its persistent and pervasive quality
03
长蛇座, 长蛇
a long faint constellation in the southern hemisphere near the equator stretching between Virgo and Cancer
04
九头蛇, 勒拿九头蛇
a mythical serpent-like creature in Greek mythology that has multiple heads, and if one head is cut off, two more will grow in its place
