生老病死是不可抗拒的规律。长生不老的八仙 ,他们的形象 ,他们的境界 ,对我们 ,永远充满着魅力 ,然而只是幻想。不过在大自然里 ,从某个角度来看 ,死亡就不是不可避免的了。有些动物 ,有长生不老的秘诀。就拿水螅来说吧。这种腔肠动物 ,生活在淡水里 ,新陈代谢的过程快得出奇 Health and death is an irresistible law. Immortal Immortals, their image, their realm, always full of charm to us, but just fantasy. However, in nature, from a certain point of view, death is not inevitable. Some animals have immortality tips. Take the water 螅 for example. The coelenterate, living in fresh water, the process of metabolism is surprisingly fast