凡禽鸟都是卵生，而它却是胎生的。
Every birds bird is oviparous, and it is viviparity however.
人和其他大多数哺乳动物都是胎生的。
鲸是胎生的，幼鲸靠吃母鲸的奶长大。
The whale is viviparous, the baby to eat mother's milk to grow up.
男披新被女盖斗，头一胎生的不是大丫头。
Male wears new quilt and female covers bucket. Then the first viviparous is not a big girl.
这位政老爷的夫人王氏，头胎生的公子，名唤贾珠。
Lady Wang, Jia Zheng's wife first gave birth to a son, named Jia Zhu.
相比之下，鱼龙和其他现代胎生的物种产下多个幼崽。
Ichthyosaurs and other contemporary viviparous species, by contrast, gave birth to multiple offspring.
一项新研究发现，近半数美国人希望头一胎生的是男孩。
Almost half of Americans want their first child to be a boy, according to a new study.
同一胎生的幼崽即被称作同窝出生者(littermate)。
种苗胎生的孕育环境宿存果皮是一个盐分累积提高的高盐环境，这有利于种苗在胎生过程中对盐分的抗性锻炼。
The fruits or persistent pericarps of breeding seedlings during the viviparous developing were rich in the salt and this may do favorable to adaptation of seedlings to highly saline environment.
近一个世纪前，生物学家发现，如果他们在无脊椎动物胚胎生命的早期阶段将其分成两部分，它会存活下来并发育成两个正常的胚胎。
Nearly a century ago, biologists found that if they separated an invertebrate animal embryo into two parts at an early stage of its life, it would survive and develop as two normal embryos.
因此，直到最近发现蜥脚类恐龙筑巢地的化石之前，科学家们还不能确定蜥脚类动物到底是产卵还是胎生。
Until the recent discovery of fossilized sauropod nesting grounds, scientists were thus uncertain whether sauropods laid eggs or gave birth to live young.
鲨鱼有三种繁殖方式，它们的繁殖方式因物种而异，分别是卵胎生、胎生和卵胎生。
Sharks display three ways to bear their young, varying by species, oviparity, viviparity and ovoviviparity.
从人胚胎生殖嵴、肠系膜中消化分离的原始生殖细胞，将其接种在人子宫内膜成纤维细胞饲养层上传代培养。
PGC from genital ridge and mesenterium of human embryo was incubated on fibroblast feeder layers for subculture.
但我们今天使用的合胞体蛋白基因可能实际上已取代了最初病毒传给第一个胎生哺乳动物的基因。
But the syncytin genes we use today may have actually replaced an ancestral one that a virus bequeathed to the very first placental mammals.
鱼龙和鲸类的另一点相似在于：不像其他目前存活的卵生爬行类，他们胎生生下后代。
Ichthyosaurs also resembled cetaceans in another way: unlike most living reptiles, which lay eggs, they gave birth to live young.
日本轮胎生产商横滨轮胎正在推广一种含从橘子果汁的副产品—橘皮---中提炼的油料制成的轮胎。
Yokohama, a Japanese tyremaker, is promoting a tyre made with oil from orange peel, a waste product from the production of orange juice.
多胎生产被排除了，因为甚至在自然状态下，怀三胞胎也有很高的患并发症的风险。
Multiple births were excluded because even naturally conceived multiples have a high risk of complications, Romundstad says.
值得注意的是，接受数量考察的都是卵胎生种类（另外一些种类，比如蟒蛇，则是卵生）以及静候捕猎的种类，这会让他们更容易受到环境变化带来的影响。
Notably, the snake populations studied all give birth to live young (other species like pythons, lay eggs) and are sit-and-wait predators, making them more vulnerable to change in their environments.
澳大利亚悉尼大学的爬虫学者瑞克.谢利（RickShine）说，“胎生在爬虫类动物中有了成百倍的进化，所以它们不再多产也很正常。
"Viviparity has evolved about a hundred times in reptiles," said herpetologist Rick Shine of the University of Sydney in Australia.
这些结果与大豆胚胎生长速率对高光照的反应相一致。
These results are consistent with a high irradiance response for growth of soybean embryos.
但用于汽车轮胎生产量，常加入一定量的金红石型产品，以增强抗臭氧和抗紫外线能力。
But for car tyres production, often join a certain amount of rutile type products, to enhance the ozone resistance and ultraviolet ability.
我们家的猫一胎生了四只小猫。
研究发现，尽管人们普遍认为养儿子更容易，但那些希望头胎生女儿的夫妇则认为长女会为弟妹树立“更好的榜样”。
The study found that while raising a boy is perceived as easier, couples who wanted to have a daughter first see older girls as 'better role models' to their younger siblings.
在胎生苗叶片产生以前，它的营养全部由母体提供，属于全异养阶段，这是一种典型的觅源行为；
Before the formation of leaves, the nutrition for the development of viviparous plantlet is supplied by its parent, which is a kind of typical foraging behavior.
胎生苗在脱落与散布时表现出的特点说明：胎生苗的扩散行为是与其特殊的环境条件相适应的。
The traits showed when the viviparous plantlets abscise and disperse that the dispersing behavior for the viviparous plantlets is adaptable to the special environment.
上帝对夏娃说他将增加她怀胎生产的苦楚，她也要受丈夫的管辖。
God told Eve she would suffer pain as she gave birth to children, and that her husband would rule over her.
影响纳西族妇女生殖道感染的主要危险因素是：妇女居住的恶劣环境、多胎生育、经济状况差、文化水平低等。
The risk factors influencing RTIs of Naxi women were bad resident environment, order births, low income, low educational level, etc.
影响纳西族妇女生殖道感染的主要危险因素是：妇女居住的恶劣环境、多胎生育、经济状况差、文化水平低等。
The risk factors influencing RTIs of Naxi women were bad resident environment, order births, low income, low educational level, etc.
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