We have isolated around 30 or 40 strains already of unicellular eukaryotes.

Malavin：我已经分离出大约 30 或 40 株单细胞真核物。

Why don't we get unicellular elephants, or blue whales, or brown bears?

为什么我得不到单细胞大象、蓝鲸或棕熊？

Most unicellular reproduction is asexual, meaning one organism, on its own, can reproduce itself.

大多数单细胞繁殖是无性的，这意味着物体可以自行繁殖。

But these could be the fossils of colonial unicellular organisms, bacterial mats, or something else entirely.

但这些可能是殖民地单细胞物、细菌垫或其他完全不同的东西的化石。

Those are simple, unicellular life forms that thrive without oxygen and get energy by scavenging what molecules they find.

这些是简单的单细胞命形式， 在没有氧气的情况下也能茁壮成长，并通过清发现的分子来获取能量。

Yet even the biggest unicellular organisms have limits, and none grows nearly as large as the elephant, whale, or bear.

然而， 即使是最大的单细胞物也有局限性，没有种能像大象、鲸鱼或熊那样长得那么大。

If that's true, though, then there's a problem: Most unicellular life at the time was photosynthetic -- like cyanobacteria and phytoplankton – and they need light to live.

不过， 如果这是真的，那就有问题了：当时大多数单细胞命都是光合作用的——就像蓝藻和浮游植物样——需要光才能存。

In the 1940s, author Jack Williamson coined the term, " terraforming." To terraform is to create an ecosystem that supports living organisms—from large, complicated vertebrates, to simple, unicellular bacteria.

在 1940 年代，作家杰克·威廉姆森 (Jack Williamson) 创造了“地形改造”词。地形改造就是创造支持物体的态系统——从大型、复杂的脊椎动物到简单的单细胞细菌。

For 2 billion years, all organisms on Earth are unicellular, and they likely lived in the oceans, shielded from the hard ultraviolet light of the sun but then something remarkable happened, Photosynthesis.

20亿年以来，地球上的所有物都是单细胞的，很可能活在海洋中，不受太阳紫外线的照射，但随后发了件非同寻常的事情，就是光合作用的产。

A further argument against the simple wear and tear theory is the observation that the time within which organisms age lies between a few days (even a few hours for unicellular organisms) and several thousand years, as with mammoth trees.

反对简单磨损理论的另论点是观察到物体老化的时间介于几天（对于单细胞物甚至是几小时）到几千年之间，就像猛犸象树样。