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字词 水螅
释义 水螅shuǐxī腔肠动物,身体圆筒形,褐色,口周围有触手,是捕食物的工具,体内有一个空腔。附着在池沼、水沟中的水草或枯叶上。大多雌雄同体,生殖方法有二:
通常进行无性生殖(由身体长出芽体);夏初和秋末进行有性生殖。{hydra (Hydra); hermaphroditic coelenterate that typically has a brown hollow cylindrical body, with a mouth at one end surrounded by tentacles as food catchers, and closed at the other end and attached to water weeds or withered leaves in ponds or marshes, and that reproduces either through parthenogenesis (producing gemma from the body itself) or by sexual reproduction in early summer and late autumn}
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更新时间:2025/1/16 15:57:25