五年前，在世界上唯一的梅里克海龟的筑巢地——贝克海滩，发生了一起重大的化学物质泄漏事件，导致当年几乎所有的海龟卵无法孵化。
A major chemical spill occurred five years ago at Baker's Beach, the world's sole nesting ground for Merrick sea turtles, and prevented nearly all the eggs laid that year from hatching.
但是请想象一下，如果一定数量的雌雌伴侣某个基因发生突变，并且使它有能力区别哪个是自己产的卵，哪个是它同性伙伴的，贝利说。
But imagine if a genetic mutation arose in one member of a female-female pair that enabled her to distinguish her egg from that laid by her partner, says Bailey.
一项由比利时科学家发表新的研究报告建议，超过90%的试管授精卵会发生严重的染色体反常。
A new study reported by Belgian scientists suggests that there are severe chromosome abnormalities found in over 90% of eggs fertilized for in vitro treatments.
该研究还发现，自闭症在同卵和异卵双胞胎中的发生率均高于一般人群。
The study also found that autism rates among both identical and fraternal twins were higher than in the general population.
发生此类现象是因为一个嵌合双胞胎会产生于没有得到雄性动物施精的卵, 但它会在某些皮肤细胞中含有该雄性动物的遗传基因.
This couldhappen because a chimeric twin that grew from an egg which his sperm did notfertilise would nonetheless have some skin cells containing his genes.
通过对同卵和异卵双胞胎的大量研究，研究人员分析了愉悦和不快的情感发生中，遗传学所起的作用。
In an umber of studies of identical and fraternal twins, researchers have examined the role genetics plays in happiness and unhappiness.
结果表明蝗虫的发生时期和世代及蝗卵能否顺利孵化主要是由气象环境决定的；
The results show that the occurrence date, generations in a year and whether locusts eggs can incubate successfully are mainly determined by meteorological condition.
这样的水渍状褐变则极少发生在卵孵化正常的汕优63上。
Such watery lesions seldom occurred on SY-63, where the eggs hatched normally.
高浓度雌二醇对卵黄发生前期卵母细胞卵径增大也有明显刺激作用（P＜0．01）；
High concentration of oestradiol had a significant stimulation (P<0. 01) on oocyte diameter increase at the previtellogenesis stage.
当肝脏发生严重损伤且肝细胞再生障碍时，卵圆细胞被激活并大量增殖，参与肝脏损伤的修复与重建。
Oval cells are activated to proliferate and regenerate liver tissue when the liver damage is extensive and chronic, or if proliferation of hepatocytes is inhibited.
大量的研究结果证实伴卵圆孔未闭者发生隐性脑卒中的机率及复发率明显高于正常人群。
Most studies have confirmed that the incidence and recurrence of cryptogenic stroke in patients with PFO is markedly higher than in the normal population.
多发性硬化症斑块多发生于侧脑室体部旁和大脑半球半卵圆中心，胼胝体和脑干也是好发部位。
RESULTS Multiple sclerosis plaques located in the periventricular area, central of cerebral hemisphere and also at the corpus callosum and brain stem.
前者包括生殖托的发生、精卵的排放及合子的发育与环境因子的关系。
The former includes the occurrence of receptacles, the liberation of sperms and eggs, and the relation between the development of zygotes and environmental factors.
介绍了卵菌病害的发生特点及由卵菌引起的几类主要植物病害的化学防治现状、存在的问题，并结合我国的实际情况就卵菌病害的化学防治策略进行了探讨。
The occurring characteristics, chemical control situation and problem of disease caused by Oomycete were described, and the chemical control strategy of Oomycete disease was discussed in detail.
如果一种性状或疾病在同卵双胞胎中的同时发生的概率高于异卵双胞胎，那么这种性状或疾病是“可遗传的”。
A trait or disease is called heritable if monozygotic twins are more similar to each other than dizygotic twins.
目前，人们对于转入的异质卵胞质中对胚胎的发生和发育造成影响的因素并不完全了解。
At present, how the heterogenous ooplasm influences the embryogenesis and development is not entirely clear.
卵丘-卵母细胞复合物各组的卵母细胞生殖泡破裂发生率和第一极体排除率明显高于裸卵各组（P<0.05）。
Percentage of undergoing germinal vesical breakdown and PB1 extrusion in cumulus-oocyte complex groups was higher than that in denuded oocyte groups(P<0.05).
依据棉田发生为害规律，三代玉米螟防治时间，以卵盛期用药最佳。
According to this, the best control time for the 3rd genera...
依据棉田发生为害规律，三代玉米螟防治时间，以卵盛期用药最佳。
According to this, the best control time for the 3rd genera...
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