前哺乳动物

Sperm capacitation is an essential mature process before mammalian fertilization. Making sperm capacitated in vitro is an important prerequisite to complete fertilization in vitro.

精子获能是哺乳动物受精前必须经历的一个成熟过程，所以精子的体外获能便是实现体外受精的一个重要前提。

The studies on the capacities of immune responses of lymphocytes in peripheral blood and immune organs of Grass Carp (Ctenpharyngoden idellus Cuvier et Valencinnes) to PHA and SPA with incorporation of 〓H-TdR and active reaction of Acid α-Naphthyl Acetate Esterase indicated that there were T and B lymphocytes in peripheral blood of grass carp, but only T lymphocyte and no B lymphocyte in the thymus of grass carp. It was justified that the T lymphocytes in peripheral blood was originated from the thymus, and B lymphocyte could be from the spleen and anterior kidney of grass carp.

运用〓H-TdR掺入法和酸性醋酸萘酯酶活性检测法分别研究了草鱼外周血以及免疫器官中的淋巴细胞对PHA和SPA的免疫应答以及化学标志特征，发现草鱼外周血中存在着类似于哺乳动物的T、B两类不同的淋巴细胞亚群；同时也发现胸腺中只有T淋巴细胞，而无B淋巴细胞，提示了胸腺中淋巴细胞可能是外周血中T细胞的来源，而B淋巴细胞可能来自脾脏或前肾。

Evolution on land produces more bizarre beasts lied the sail-backed, super-predator, the Dimeterodon, the half-reptile, half-mammal Gorgonopsid and the Euparkeria, a finny reptile whose descendants will one day become dinosaurs.

四米长的海蝎子，十尺长并长有狗状头骨的哺乳动物，还有如人类头般大的巨型蜘蛛，以上提到的并非是在恶梦才会见到的生物，而是在恐龙出现前，曾经占领地球中的几种动物。

Evolution on land produces more bizarre beasts lide the sail-backed,super-predator,the Dimeterodon,the half-reptile,half-mammal Gorgonopsid and the Euparkeria,a finy reptile whose descendants will one day become dinosaurs.

四米长的海蝎子，十尺长并长有狗状头骨的哺乳动物，还有如人类头般大的巨型蜘蛛，以上提到的并非是在恶梦才会见到的生物，而是在恐龙出现前，曾经占领地球中的几种动物。

Any of various small, insectivorous mammals of the family Talpidae, usually living underground and having thickset bodies with light brown to dark gray silky fur, rudimentary eyes, tough muzzles, and strong forefeet for burrowing.

鼹鼠：一种小而以虫类为食的鼹鼠科的哺乳动物，通常生活在地下，有长着淡褐色到深灰色柔软皮毛的矮胖身体，退化的眼睛，坚韧的口部和为打洞用而强壮的前足。

The classic example is the ear ossicles of mammals, which we know from palaeontological and embryological studies originated in the upper and lower jaws and the hyoid of their Synapsid ancestors, and further back still were part of the gill arches of early fish.

典型的例子是哺乳动物的听小骨。我们从古生物学和胚胎学研究了解到，哺乳动物的听小骨起源于它们单弓型祖先的上下颌骨和舌骨，再往前则是早期鱼的鳃弓的一部分。

The preimplantation development competences of somatic cell nuclear transfer embryos reconstructed with enuleated goat Metaphase II oocytes matured in vivo and whole cells derived from adult fibroblasts of several mammalian species (goat, boer goat, bovine, tahr, panda) and human patient were evaluated.

研究去核山羊体内成熟的M II期卵母细胞与异种成年的哺乳动物(包括山羊、波尔山羊、牛、塔尔羊、熊猫)及人的成纤维细胞融合形成的体细胞核移植胚胎着床前的发育能力。

A small, herbivorous, extinct mammal of the genus Hyracotherium from the Eocene Epoch of the western United States, having four-toed front feet and three-toed hind feet and related ancestrally to the horse.

始祖马始新世产于美国西部的一种属于蹄兔属的哺乳动物，已灭绝，体型小，食草，前蹄四趾，后蹄三趾，为马的远祖

A mammal, such as the bat, that is a member of the order Chiroptera and has forelimbs modified as wings.

翼手目动物如蝙蝠等属于翼手目的哺乳动物，其前翼进化成翅膀

They move the same two legs on each side in alternate steps, 1, 3, 2, 4, rather than the 1, 4, 2, 3 pattern of most mammals and nearly all ungulates (such as horses, goats, sheep and bison).

和大多数哺乳动物和几乎所有的有蹄动物如马、羊和牛的行走方式不同，它们行走时一侧的前后肢向前挪动而另一侧的前后肢着地。

As she looked at Warrington's manly face, and dark, melancholy eyes, she had settled in her mind that he must have been the victim of an unhappy attachment.

每逢看到沃林顿那刚毅的脸，那乌黑、忧郁的眼睛，她便会相信，他一定作过不幸的爱情的受害者。

Maybe they'll disappear into a pothole.

也许他们将在壶穴里消失