1·Males contribute to parental care in fewer than five percent of all mammalian species.
在所有哺乳动物物种中，只有不到5%的雄性承担父母养育的责任。
2·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。
3·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。
4·The team examined the rate of evolution of the PSD proteins over millions of years of mammalian evolution, expecting the proteins to evolve at the same rate as other proteins.
研究小组还计算了在哺乳动物数百万年进化过程中P SD蛋白的进化速率，期待这些蛋白能以与其他蛋白一样的速率进化。
5·These lice would not show up in his tree, Dr. Smith said, unless they had been able to transfer to the placental mammalian species, and most lice do not regularly switch hosts.
史密斯博士说这些虱子不会在他的系统树上出现，除非它们转变成寄生在胎盘类哺乳动物身上的物种，而大多数虱子不会经常变换宿主。
1·IntroductionThe centrosome is the major microtubule organizing center (MTOC) of mammalian cells.
中心体是哺乳类细胞主要的微管组织中心。
2·It has been demonstrated that Schistosome is pathogen of schistosomiasis, and the mammalian animal (the end host) and snails (the intermediate host) are their two hosts.
研究表明，血吸虫是血吸虫病的病原体，哺乳类动物(终末宿主)和钉螺(中间宿主)是血吸虫的两个宿主。
3·DMT1, identified as the first mammalian transmembrane iron transporter in 1997, is responsible for iron uptake from small intestine and transport from endosomes to cytoplasm.
DMT1是1997年发现的哺乳类第一个跨膜铁转运蛋白，它是近年铁代谢研究领域最重大的一项突破。
4·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。
5·Nontargeted mutagenesis refers to the mutagenesis that happens to undamaged base sites of DNA, its mechanisms in mammalian cells remain to be verdied.
非定标性突变是发生在DNA损伤剂攻击部位之外的突变，其在哺乳类细胞的形成机制是一个亟待解决的课题。
1·Ferrets are another mammalian species known to be susceptible to infection.
雪貂是另一种已知易受感染的哺乳类动物物种。
2·"Studying the effects of the chirping sound on other mice could promote research into the evolution of mammalian verbal communications," said Arikuni Uchimura, the researcher from Osaka University.
大阪大学的研究员内村有邦说：“通过调查这种鸟鸣一样的叫声对其他老鼠的影响，可能有助于推动对哺乳类动物语言交流进化的研究。”