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科普中国 on MSN
4 天
看起来柔弱却经历了地球五次生物大灭绝,太顽强了吧!
水母(英文名Jellyfish)是刺胞动物门(旧称腔肠动物门)中的无脊椎动物,它们像一把把灵动的雨伞在水中沉沉浮浮,早在5亿年前就已经生活在海洋中了。水母的身体中大约95%的成分都是水,所以看起来非常柔弱,但是你可别小瞧了它们,它们可是历经了地球五次 ...
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