But hydra have neural nets of diffuse brain cells, rather than a dense organ-like we have.

但水螅有弥漫的脑细胞构成的神经网络，而不像我们有个密集的器官。

It was, like, kind of like the hydra's head.

它有点像九蛇的。

Such are the persons who want to unchain the hydra of revolutions! --LE JOHANNISBURG, Pamphlet.

就是这样的人想要解开革命的九蛇！--LE JOHANNISBURG，小册子。

Instead of a brain, hydras have nerve nets, the most basic nervous systems in nature.

水螅没有大脑，而是拥有神经网络 ，这是自然界中最基本的神经系统。

This year, a group of Japanese scientists demonstrated that hydras sleep.

今年，群日本科学家 证明了水螅睡觉。

Can humans learn the secrets of longevity from the hydra, a tiny aquatic creature capable of indefinite self-renewal?

人类能否从水螅这种具有无限自我新能力的微小水生生物身上学到长寿的秘诀呢？

See, hydra bodies are really simple: one head and one foot lined up along a single body axis.

看，水螅的身体真的很简单：个只脚沿着个身体轴排成行。

When you see a Source hydra panel, it looks a little bit like a normal solar module, except for just a little thicker.

Source 水力板看起来有点像普通的太阳能模块，只是稍微厚了点。

But there are a few exceptions to this get-older-and-die thing -- including, it turns out, tiny sea creatures called hydras.

但是， 这种变老死亡的事情也有些例外——事实证明，包括被称为九蛇的微小海洋生物。

The team followed more than two thousand individual hydras for a combination of 3.9 million days.

该团队跟踪了 2000 多只单独的九蛇，总共跟踪了 390 万天。

The alignment of actomyosin fibers in the spheroid lays out a structure that gets inherited throughout the new hydra’s body.

球状体中肌动球蛋白纤维的排列构成了种结构，该结构在整个新水螅体内得到遗传。

Like the mythical hydra, maybe this is a beast that never can be truly  slain with just chopping off its heads.

就像神话中的九蛇样，也许这是种永远无法通过砍下来真正杀死的野兽。

And THAT is what I have been able to do that most hydras can’t.

这就是我能够做到的，而大多数九蛇做不到的。

No decline in fertility, or increase in mortality, was observed at any point in the hydra life cycle.

在水螅生命周期的任何时候都没有观察到生育率下降或死亡率增加。

So these regenerated hydra were more deformed, and usually had multiple body axes – like two mouths and two feet.

所以这些再生的九蛇加变形，而且通常有多个身体轴——比如两张嘴两只脚。

So how do hydras not decline with age?

那么九蛇如何不随着年龄的增长而衰退呢？

And hydra – the squishy tube-shaped freshwater animal, not the mythological sea serpent or Marvel villain – are really, really good at it.

九蛇——种柔软的管状淡水动物，而不是神话中的海蛇或漫威反派——真的非常擅长。

And even though hydra regeneration is a little more extreme, it’s similar to how we humans heal wounds and develop as embryos.

尽管水螅的再生有点极端，但它类似于我们人类治愈伤口发育成胚胎的方式。

According to a study that came out this week from the Max Planck Institute in Germany, there’s another exception to this rule: the hydra.

根据德国马克斯普朗克研究所本周发表的项研究，这条规则还有另个例外：九蛇。

Every cell in a hydra’s body is replaced every three to four weeks, by fresh cells produced by brand new stem cells.

水螅体内的每个细胞每三到四个星期就会被全新干细胞产生的新鲜细胞换次。