哺乳动物的

The aardvark is a mammal that burrows into the ground to catches ants and termites.答案:D

翻译参考：土豚是一种可以在地上打洞捉蚂蚁和白蚁的哺乳动物。

The aardvark is a mammal that burrows into the ground to catches ants and termites.

参考译文：土豚是一种可以在地上打洞捉蚂蚁和白蚁的哺乳动物。

Loxodonta Africana is the largest living mammal in the land.

陆地上最大的哺乳动物，非洲象

However, direct evidence of alimentary transmission and infection in mammals is lacking.

然而， 在哺乳动物中缺乏饮食传播和感染的直接证据。

Back in 1972 when the Marine Mammals Protection Act was passed, the use of ambergris in perfumes was banned.

早在1972年时，海洋哺乳动物保护法获得通过后，使用龙涎香的香水被禁止。

EZ was we akly positive in CM effects test but it may not induce aneuploid in mammalian ce lls.

益康唑对细胞有丝分裂有与秋水仙素相类似的效尖，进一步分析表明其在哺乳动物体细胞内无非整倍体诱发效应。

These results demonstrate that constitutive expression of Tert provides antiaging activity in the context of a mammalian organism.

这些研究结果表明在哺乳动物有机体背景下，端粒逆转录酶能够产生抗机体老化的作用。

First,we have discovered stone artefacts in caves, which have similar features to that were broadly scattered in laterite terraces in Bose basin(0.8 Ma B.P),next study on deposits and fauna will be hopefully contributed to document paleoenvironmental background of early human;Second,early human fossils,Gigantopithecus and mammalian fossils unearthed in Mohui cave provide new evidence of early human origin; Third,after our scientific excavation in Fengshudao site in Bose basin, we have found five pieces of bi-face LCT with 10 tektites and nearly 100 stone artefacts form original laterite deposit.This important discovery is very answerable to international question about stratigraphic suspect of LCT; Fourth, abounding mammallian fossils with human fossils and remains from early Pleistocene to Holocene have been uncovered after systematically excavation in marginal cave of Bose basin.These discoveries are significant to the study on human evolution and establishment of sequence of Quarternary biological-stratigraphic in southern China.

首先，我们在百色盆地边缘洞穴堆积物中，发现与百色盆地内网纹红土阶地（0.8 Ma ）类型相似的石制品，通过对堆积物及其包含动物群的研究有望对解决早期人类生存环境背景作出贡献；其次，在么会洞发现了早更新世早期大约1.8 Ma 的人类化石、巨猿化石和丰富的哺乳动物化石，为解决早期人类起源提供了新的证据；再次，在百色盆地枫树岛旧石器时代遗址，通过科学发掘，从原生地层中发现五件与玻璃陨石共生的手斧，以及近百件其它类型的石制品，解决了目前国际学术界普遍关注的百色手斧的层位问题，为进一步确定百色旧石器的时代奠定了基础；另外，通过对百色盆地边缘洞穴的系统发掘，发现了自早更新世早期至全新世以来不同时代的大量哺乳动物化石，同时还发现中更新世晚期--晚更新世早期和全新世的人类化石和石制品，对研究人类演化、建立华南第四纪生物地层序列具有重要的科学意义。

Cast, the number of hawks or falcons cast off at one time, usually a pair; cete, a company of badgers; covert, a flock of coots; covey, a family of grouse, partridges, or other game birds; drift, a drove or herd, especially of hogs; exaltation, a flight of larks; fall, a family of woodcock in flight; gam, a school of whales, or a social congregation of whalers, especially at sea; kennel, a number of hounds or dogs housed in one place or under the same ownership; kindle, a brood or litter, especially of kittens; litter, the total number of offspring produced at a single birth by a multiparous mammal; muster, a flock of peacocks; nide, a brood of pheasants; pod, a small herd of seals or whales; pride, a company of lions; rout, a company of people or animals in movement, especially knights or wolves; school, a congregation of fish, or aquatic mammals such as dolphins or porpoises; shrewdness, a company of apes; skein, a flight of wildfowl, especially geese; skulk, a congregation of vermin, especially foxes, or of thieves; sloth, a company of bears; sord, a flight of mallards; sounder, a herd of wild boar; stable, a number of horses housed in one place or under the same ownership; swarm, a colony of insects, such as ants, bees, or wasps, especially when migrating to a new nest or hive; troop, a number of animals, birds, or people, especially when on the move; warren, the inhabitants, such as rabbits, of a warren; watch, a flock of nightingales; and wisp, a flock of birds, especially of snipe.

cast 指一次所放飞的鹰或隼的数目，通常为一对： cete，一群； covert 一群大鹋； covey，一群松鸡、石鸡或其它作猎物的鸟； drift，一群或一堆，尤指家猪； exaltation，一群云雀； fall，一群飞行中的丘鹬； gam，一群鲸或一伙捕鲸人，尤指在海上的； kennel，一群住在一起或属同一个人所有的猎狗或狗； kindle，一窝或一巢，尤指小猫： litter，一产多胎的哺乳动物一次所生的幼仔的总数； muster，一群孔雀； nide，一窝野鸡； pod，一小群海豹或鲸； pride，一群狮子； rout，一群在行进中的人或动物，尤指骑士或狼； school，一群鱼或水生哺乳动物如海豚或小鲸； shrewdness，一群猿； skein，一群猎鸟，尤指鹅； skulk，一群害兽或坏人，尤指狐狸或小偷； sloth，一群熊； sord，一群野鸭； sounder，一群野公猪； stable，住在同一处或属同一个人所有的一群马； swarm，一群昆虫，如蚂蚁、蜜蜂或黄蜂，尤指当它们迁往一个新的巢或蜂房时； troop，一群动物、鸟或人，尤指在行进中时； warren 养兔场的一群动物，如兔子； watch 一群夜莺； wisp 一群鸟，尤指鹬鸟参见同义词 crowd

Glioma is still one of refractory disease in the neurosurgical field; the development of new primary and adjuvant treatment is vital. Recently, the gene therapy of glioma is developed rapidly and there are many methods about the gene therapy that include: suicide gene therapy, immunologic gene therapy, drug resistangce gene therapy, angiostatin gene therapy and so on. The sucide gene therapy is the most potential approach of antitumer, these nonmammalian genes encode enzyme that convert nontoxic prodrugs into highly toxic metablites. Cells transfected with suicide genes are targeted for specific negative selection, witch can be induced by administrtion of the corresponding produg. Among the enzyme/produg combinations, two of the best characterized system are herpes simplex virus thymidine kinase /ganciclovir and Escherichia coli cytosine deaminase /5-flourocytosine (5-FC). The formor can convert the antiviral nucleoside analogs acyclovir , ganciclovir to their nucleoside monophosphate derivatives, the monophosphate forms are subsequently phosphorylated by endogenus cellular kinases to triphosphates, these molecules are potent inhibitors of DNA synthesis.

近年来脑胶质瘤的基因治疗发展迅速，应运而生的方法有自杀基因、免疫基因、多药耐药基因以及抗血管生成基因等，其中自杀基因被认为是最有前景的基因治疗方法，它又称病毒介导的酶／药物前体疗法，是利用转基因技术将哺乳动物细胞中所不含有的自杀基因转入到哺乳动物肿瘤细胞中，该基因表达的产物可将无毒的药物前体转化为毒性药物，从而选择性杀伤该肿瘤细胞，常用的自杀基因有单纯疱疹病毒-胸苷激酶基因和大肠杆菌胞嘧啶脱氨酶基因，前者催化无毒性抗病毒核苷类似物如丙氧鸟苷、无环鸟苷等成为单磷酸核苷衍生物，然后在内源性细胞激酶作用下转化为具有明显毒性的三磷酸核苷，作为DNA合成链的终止剂和DNA合成酶的抑制剂，干扰细胞DNA的合成；后者编码的胞嘧啶脱氨酶可催化5-氟胞嘧啶（5-FC）脱氨成为5-氟尿嘧啶（5-FU），然后代谢为有毒性的5-氟尿嘧啶-5′三磷酸（5-FUTP）和5-氟-2′脱氧尿嘧啶-5′磷酸（5-FdUTP），5-FUTP通过与UTP竞争性结合而抑制mRNA和tRNA的合成，5-FdUTP则作用于胸苷合成酶，导致TMP衰竭而阻止DNA的合成，最终诱导肿瘤细胞凋亡。

I didn't watch TV last night, because it .

昨晚我没有看电视，因为电视机坏了。

Since this year, in a lot of villages of Beijing, TV of elevator liquid crystal was removed.

今年以来，在北京的很多小区里，电梯液晶电视被撤了下来。