In the time when the dinosaurs dominated the daytime economy, our mammalian ancestors probably only managed to survive at all because they found ways of scraping a living at night.
在恐龙主宰着白天的局势的时代，我们的哺乳动物祖先之所以能够勉强生存下来，可能只是因为他们找到了在夜间谋生的方法。
Although de Ricqlès urged caution, arguing for an intermediate type of dinosaur physiology, a generation of paleontologists has come to believe that dinosaur bone is mammalian like.
尽管de Ricqlès 极力主张谨慎对待，主张恐龙生理学的一种中间类型，但这一代古生物学家已经开始相信恐龙骨骼与哺乳动物相似。
But biologists reconstructing the mammalian tree of evolution from the DNA of living species have come to a different conclusion.
但是利用现存物种的DNA重建哺乳动物系统树的生物学家却得出了不同的结论。
In his view, the hosts on which lice were speciating during the Cretaceous could have been a different branch of the mammalian family tree, all of whose species are extinct.
在他看来，在白垩纪虱子物种进化时的宿主可能是哺乳动物系统树上的另一分支而这一分支上的所有物种都灭绝了。
The fact that they were able to make such animals means that we can now get over the genetic barriers to a mammalian virgin birth - in mice at least.
人为造出此类动物的这一事实意味着我们现在可以跨越遗传学上哺乳动物不能进行单性生殖的障碍——至少实现了老鼠的单性生殖。
Giving up my work in the mammalian brain to go work on invertebrates, they thought, was a major step backwards.
我放弃研究哺乳动物大脑的工作，转而研究无脊椎动物。他们认为，这是一个很大的退步。
Granted, I've only mentioned baboons and starlings, but there you've got a mammalian representative and an avian one.
虽然我只是提到了狒狒和八哥，但是它们是哺乳动物和禽类的代表。
In mammalian cells, the promoter is a complex region containing binding sites for many proteins that regulate gene expression.
在哺乳动物细胞里，启动子是一个包含着许多蛋白质结合位点的复杂区域，它调节基因的表达。
Until now, however, no one had applied the visualization technique to observing a single gene in mammalian cells.
然而，直到现在，还没人曾将可视化技术应用到观察哺乳动物细胞的单个基因上。
One striking example of an atavism is the human coccyx, or tailbone, which is a relic of the mammalian tail.
关于返祖的一个有力例证就是人类的尾骨，它是哺乳动物尾巴的遗留物。
Officials in Germany have today confirmed H5N1 infection in a second mammalian species, the stone marten.
德国官员今天在第二种哺乳动物物种—岩貂身上确认了H5N1型病毒感染。
It arises from intense stimulation of the reward circuitry of the brain — a portion of the ancient "mammalian brain," which lies under the newer neocortex (rational brain).
它来源于对大脑的反馈回路的强烈刺激——古老的“哺乳动物大脑”的一部分，它位于大脑新皮质之下。
There's a higher chance that human or mammalian cells can be induced into doing the same thing.
人类或哺乳动物的细胞更有可能被诱导来做同样的事情。
Mammalian cells make only the single-stranded variety. If a cell’s defence mechanisms detect double-stranded RNA they destroy it, to protect against infection.
哺乳动物细胞只能识别单链RNA,如果细胞的防御机制发现了双链RNA就会破坏它以保护机体不受病毒的感染。
Inhibits also most of other mammalian serine proteases but at a lower rate.
也抑制大多数其他哺乳动物丝氨酸蛋白酶但速率低。
Our study is the first to experimentally demonstrate that the mammalian heart can completely regenerate heart muscle during a defined window of development.
我们的研究首次以实验证实了：在一个特定的发育时间窗口内，哺乳动物的心肌可完全再生。
Although the pathogen propagates as spores and in a filamentous form in the environment, H. capsulatum is found almost exclusively in the yeast form within mammalian hosts.
虽然孢子和丝状的形式在环境中的病原体的传播，荚膜几乎只存在于哺乳动物宿主内的酵母形式。
Intriguingly, before the heart of a developing mammalian embryo separates into four Chambers, it looks similar to the two-chambered zebrafish heart.
非常有趣的是，发育中的哺乳动物晶胚的心脏在分化为四腔室前，与斑马鱼的双腔心脏非常相似。
This approach is based on a model of the behavior of complex cells in the cerebral cortex of mammalian vision.
这种方法是基于哺乳动物的大脑皮层下的复合细胞行为的模型。
Experts agree that hippos belong to the mammalian order artiodactyla, a group of even - toed, hoofed creatures whose extant representatives include camels, pigs and ruminants such as cows.
他们的结果证明，在现生哺乳类中，鲸豚与偶蹄类最亲近；骆驼、河马、猪及牛羊等反刍动物都属于偶蹄类。
The scientist has made a pointed comparison between suspensors of plant embryos and mammalian trophoblasts.
这位科学家把植物胚的胚柄与哺乳动物的滋养层做了直接的比较。
The interesting thing to note here, is that Psychopaths are essentially a different race of humans, displaying more reptilian brain than mammalian brain.
有趣的事情要注意的是，精神病患者本质地是人类不同的种族，展示更甚的爬行动物大脑多于哺乳动物的大脑。
Transcription factor AP-2 plays an important role in regulating transcription of a number of genes in mammalian development, differentiation and carcinogenesis.
转录因子ap - 2就在许多参与哺乳动物发育、分化和癌症形成的基因转录调节中起到了重要的作用。
These two tRNA synthetases link protein synthesis to a major cell signaling pathway in the given mammalian cells.
在哺乳动物细胞中，蛋白质的生物合成途径与细胞信号转导途径紧密相连。
Mouse mutants play a key role in defining mammalian gene function and modeling human disease, and are of particular importance for analyzing and exploring disease pathogenesis.
小鼠突变对于展现哺乳动物基因功能和模拟人类疾病具有关键性的作用，对分析和探讨疾病的发病机制具有特别重要意义。
Mouse mutants play a key role in defining mammalian gene function and modeling human disease, and are of particular importance for analyzing and exploring disease pathogenesis.
小鼠突变对于展现哺乳动物基因功能和模拟人类疾病具有关键性的作用，对分析和探讨疾病的发病机制具有特别重要意义。
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