Earth had just managed to evolve multicellular life.

地球上刚出现了多细胞生物。

This is the central problem that all multicellular creatures have to solve.

这是所有多细胞生物必须解决的核心问题。

Type-1 is used against bacteria and viruses; type-2 against multicellular parasites such as worms.

类型1用于对抗细菌和病毒；类型2用于对抗多细胞寄生虫，如蠕虫。

They're very old, evolutionarily speaking, and likely resemble some of our first multicellular ancestors.

从进化的角度来看，它们非常古老，很可能与我们最早的多细胞祖先相似。

Early multicellular life depended on the water in which it lived to support their skeleton-less bodies.

早期的多细胞生命依赖于它生活的水来支撑它们无骨架的身体。

But we humans, along with the rest of the multicellular animal kingdom, are substantially more complex.

但是我们人类和其他多细胞动物一样，要复杂得多。

And they can do it because they're multicellular, which is a rarity in the microbial world.

它们之所以能够做到这一点，是因为它们是多细胞的，这在微生物世界中很少见。

Several years ago, Albani and his team discovered it held the oldest fossils know of multicellular animals.

几年前，阿尔巴尼和他的研究小组发现这里保存着已知的最古老的多细胞动物化石。

Some people have even suggested that there could be multicellular life, such as fish-like creatures down there.

一些人甚至推测这些寒冷星球上还可能有多细胞生命，比如说像鱼一样的生物。

The tentacled Archaean uses proteins common to multicellular organisms and might lend insight into how the latter evolved.

这种有触角的太古代微生物使用多细胞生物共有的蛋白质，这可能有助于我们了解后者进化的方式。