The only cells it really infects are what we call respiratory epithelial cells, a one-cell layer of cells that kind of protect the breathing tubes and the lungs, all the way down to the bottom, where we have air sacs.

唯一真正受到感染细是我们所说呼吸上皮细，一种保护呼吸管和肺单细层，一直到管道底部有气囊地方。

Candida is a type of fungi, a single celled member of the yeast family.

念珠菌是一种真菌，是酵母家族单细成员。

It's even thought that fungi and animals may share a similar single-celled ancestor.

甚至于认为真菌和动有相似单细先。

From the very first cells, to you watching this now.

从最最原初那个单细开始，到现在观看这个视频你。

Long ago, Earth's oceans were filled with purple single-celled organisms called archaea.

很久以前，地球海洋里满是单细紫色生，叫做古生菌。

Bacteria are single-celled, living organisms that can exist and perform life functions on their own.

细菌是单细活生，可以独立存在并执行生命功能。

So a bigger single cell can't catch enough stuff to feed all its volume.

所以一个更大单细无法获取足够东西来养活它所有。

Life on Earth started with single-celled bacteria about 4 billion years ago.

地球上生命始于大约40亿年前单细细菌。

Dinoflagellates are one of the biggest single-celled organisms known to man.

甲藻是人已知最大单细生之一。

But the team did see single-celled organisms called ciliates in the sick urchins.

但该调查小组确实在患病海胆中发现了名为纤毛虫单细生。

Yet like the mindless single-cell organisms from which they have evolved(and like the dullest task-accomplishing machines), each is able to secure the energy and raw materials it needs to survive in the competitive environment of the brain.

然而，就像它们从中进化而来、没有思维能力单细器官一样，这些神经细中每一个都具备获取所需能量和原料能力，这种能力确保它们能在互相竞争大脑环境中生存下去。

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，地球上所有生都是单细，它们很可能生活在海洋中，不受太阳紫外线照射，但随后发生了一件非同寻常事情，就是光合作用产生。

Life evolved and diversified but most of it consisted of tiny, single-celled organisms until, about one billion years ago, the first many-celled organisms appeared.

生命进化并开始多样化，但其中大部分是由微小单细生组成，直到大约十亿年前，第一批多细生出现。

By 2.8 billion years, Earth's average surface temperature will have dramatically increased to 149 degrees celsius which means that even simple single-celled organisms on the planet will have completely died out.

到 28 亿年后，地球平均表面温度将急剧上升到 149 摄氏度，这意味着即使是地球上简单单细生也将完全灭绝。

And so we think that life would have experimented with this idea of going from being very simple single cell organisms to more complex life forms at least twice.

因此我们认为，生命至少有两次尝试从非常简单单细生进化到更复杂生命形式。

This is already affecting relations between corals and the single-celled algae with which they live symbiotically, and which give them their colour.

这已经影响到珊瑚与它们共生单细藻之间关系，而单细藻赋予了珊瑚颜色。

Mosses absorb water and nutrients from their one-celled leaves, which are uniquely designed to hold water up to 30 times their own weight.

苔藓从它们单细叶子中吸收水分和营养质，这些单细叶子被别出心裁地设计成可以留住相当于自身重量 30 倍水分。

Every living thing on Earth is made of cells, from the smallest one-celled bacteria, to the giant blue whale to you.

地球上所有生都是由细组成，从最小单细菌，到巨大蓝鲸然后到你。

The pink color comes from tiny single-celled critters called foraminifera that have red shells that tint the sand a pinkish color.

粉色来自微小单细小动，名字是孔虫，它们有红色贝壳，使沙子呈粉红色。

It's not like botanists were around over a billion years ago when that humble, hungry, single-celled organism stumbled upon that cyanobacterium.

十多亿年前，当那个卑微、饥饿单细生偶然发现蓝藻时，植学家们并不在场。