The fossils buried in Pleistocene and earlier ocean sediments were of foraminifera—small, single-celled marine organisms that secrete shells of calcium carbonate, or calcite.
在更新世和更早的海洋沉积物中埋藏的化石生物属于孔虫类生物，它们是微小的单细胞海洋生物，其分泌的硬壳由碳酸钙和方解石组成。
The ancestors of plants were photosynthetic single-celled organisms that gave rise to plants presumably lacked true roots, stems, leaves, and complex reproductive structures such as flowers.
植物的祖先是进行光合作用的单细胞生物，由此产生的植物可能缺乏真正的根、茎、叶和复杂的生殖结构，如花朵。
He reasoned that some single-celled creatures are known to enter a hibernation-like state and survive for years with no air or food.
他推断，已知的一些单细胞生物进入类似冬眠的状态，在没有空气和食物的情况下存活数年。
My boss is a single-celled organism.
我的老板是一位单细胞生物。
Nonetheless, there are indications that single-celled organisms can learn.
尽管如此，仍有迹象表明单细胞有机体可以学习。
But they don't beat single-celled organisms that emerged about 3.4 billion years ago.
但是没有34亿年前出现的单细胞生物的历史久。
Some phytoplankton are bacteria, some are protists, and most are single-celled plants.
有些浮游植物是细菌，有些是原生生物，而大多数则是单细胞植物。
VIEWED from humanity's lofty heights, single-celled creatures are the scum of the earth.
从人类的高度来看，单细胞生物是地球上的浮渣。
Single-celled organisms emerged from the primordial soup about 3.4 billion years ago.
单细胞生物大约出现于34亿年前的“原始汤”（primordial soup）。
The other challenge, besides the minimal genome, is to repeat the trick with single-celled algae.
除了最小基因组外的另一个挑战是，将戏法在单细胞藻类上重演。
This way, the single-celled cleaning crew can destroy the salt layer with no moisture penetrating the murals.
这样，这些单层细胞清洁队员可以在不使水汽进入油画的前提下除去盐层。
Jellyfish, by comparison, are 10% carbon, and diatoms (single-celled algae that are common in plankton) 20%.
相比之下，水母的碳含量为体重的10%，而硅藻(是单细胞海藻，属常见的浮游生物)则为20%。
Scientists are also discovering that our nervous system shares an even deeper homology with single-celled organisms.
科学家们甚至还发现我们的神经系统和单细胞生物有着更为深层次的同源性。
While they spend part of their life as ordinary single-celled creatures, they sometimes grow into truly alien forms.
虽然在生命的一段时间里只是普普通通的单细胞生物，有些时候却可以长成真正的外星形式。
That's something we humans have trouble enough with, let alone a single-celled organism without a neuron to call its own.
这对我们人类是够麻烦的，让一个没有神经的单细胞生物拥有自己的意愿。
In the 1970s, Todd Hennessey claimed that paramecia, the single-celled pond dweller, could be conditioned in the lab.
20世纪70年代，托德·亨尼西(ToddHennessey)声称，单细胞池塘居民草履虫，可以达到实验室要求的条件。
The single-celled photosynthetic organisms produce much of the oxygen on earth and are the base of the marine food chain.
地球上多数的氧气都是这些单细胞光合作用的生命制造的，他们还是海洋食物链的基础。
There was thought to be one exception, however, in the form of Giardia, a single-celled parasite with a nasty effect on people.
曾经一度认为有一个例外，是一种叫Giardia的单细胞寄生生物，常引起人体患鞭毛虫病。
Scientists have known for some time that life exists at such depths, but they thought it mostly consisted of single-celled organisms.
科学家们早已知道在这一深度存在有生命，但他们认为存在的主要是单细胞生物。
FOR its supporters, the idea of growing single-celled algae on exhaust gas piped from power stations is the ultimate in recycling.
对于其支持者来说，在发电厂的废气排放管道上种植单细胞藻类是再循环的根本途径。
The single-celled diatoms below—the likes of which are found in oceans worldwide—were collected with a plankton net in San Francisco Bay.
上图就是旧金山海湾的一个浮游生物网内聚集的单细胞植物硅藻——这种藻类在世界各大海洋都广泛分布。
What Dr Nedelcu and Dr Michod did was to look for an antecedent of regA in a single-celled creature, in order to find out what its job was.
Nedeclu博士和Michod博士在单细胞生物中寻找regA的antecedent，从而了解它的作用。
After all, he reasoned, some single-celled creatures are known to enter a hibernation-like state and survive for years with no air or food.
毕竟，他推断，众所周知一些单细胞生物可以进入一种类似冬眠的状态，并在没有空气和水的状态下生存数年。
At the very base are bacteria, which support phytoplankton and cytoplankton, which support single-celled animals, which support fly larvae.
塘中最基本的生物是细菌，它供养了浮游植物和cytoplankton，浮游植物和cytoplankton供养了单细胞动物，单细胞动物又供养了蝇幼虫。
He does not plan to stick to bacteria, though. The other challenge, besides the minimal genome, is to repeat the trick with single-celled algae.
虽然如此，他也没打算坚持用细菌。除了最小基因组外的另一个挑战是，将戏法在单细胞藻类上重演。
This single-celled fungus feeds on sugars and reproduces frequently—if it has enough to eat, a culture can double in population in 90 minutes.
这种单细胞生物吃糖，而且繁殖迅速——如果有足够的食料，他们的种群数量可以每九十分钟增加一倍。
An obscure single-celled flagellate with a name like a character from an Asterix book - Trimastix - also turned out to have mitochondrial genes.
一种名字有点象占星书术语的叫Trimastix的单细胞鞭毛虫隐隐出现在人们视野里，它也正好有线粒体基因。
Diatomaceous earth (which we shall hereby call DE because it's a lot easier to type) is the fossilized remains of single-celled algae called diatoms.
硅藻土(下文简称DE)是一种被称为硅藻的石化单细胞海藻。
CroV, as its full name suggests, is a parasite of Cafeteria roenbergensis, a single-celled planktonic organism that was itself discovered only in 1988.
从CroV病毒的全称可以看出，它的宿主是海洋微型异养鞭毛虫(Cafeteriaroenbergensis)——一种直到1988年才发现的单细胞浮游生物。
CroV, as its full name suggests, is a parasite of Cafeteria roenbergensis, a single-celled planktonic organism that was itself discovered only in 1988.
从CroV病毒的全称可以看出，它的宿主是海洋微型异养鞭毛虫(Cafeteriaroenbergensis)——一种直到1988年才发现的单细胞浮游生物。
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