卵细胞

One of two sperm get into an archegonium and fused with egg. The nucleus of fertilized egg began to divide, and the walls were formed after the third division. The eggs without fertilization divided two times and then disappeared.

雄配子体产生的两个精子中的一个进入颈卵器与卵细胞结合形成受精卵，受精卵核到第3次分裂形成细胞壁，没有受精的卵细胞还要进行两次有丝分裂后才消失。

In the present review, we focus on some of the recent advances and some key developmental events revealed in the fertilization process, including the role of the egg apparatus in guiding pollen tube orientation, sperm cell movement to their targeting cells, interaction between gametes, egg cell activation, and onset of embryogenesis and endosperm development.

本文着重讨论受精作用的若干重要发育事件，包括受精前卵器细胞对花粉管向胚珠定向生长的近距离引导信号，精子的靶向运动，精、卵细胞相互作用和配子融合后卵细胞的激活与中央细胞发育的启动等。

Potentially polyembryonic megagametophytes at maturitycontain either a conventional 3-celled egg apparatus(92.6% of megagametophytes).or contain the supernumeraryeggs forming either a 4-celled (5.2%) or 5-celled(2.2%)egg apparatus.

二卵卵器中卵细胞和类卵细胞大都并列位于助细胞合点极上方；三卵卵器中，合点极两个卵细胞结构并行排列，其珠孔极侧下方是另一个卵细胞结构。

According to the size and shape of cells,nuclei and nucleoli,and to the NPand the vitelline accumulation,the oogenesis can be divided into five phases:oogonium phase,small growth phase,large growth phase,pro- maturation phase and ma...

卵子发生根据卵细胞、细胞核及核仁的大小形态、核质比和卵黄积累情况可分为：1。卵原细胞期：2。小生长期；3。大生长期；4。成熟前期和5。成熟期。卵巢发育则根据第一批卵细胞的发育情况、卵巢长度及颜色分为五期，大致可归纳为三个阶段：5～7月为延缓期；8～11月为对数增长期：12～4月为稳定期。

Two polar nuclei move to the micropylar end before sperm is released in a gap between the egg cell and central cell and subsequently taking off cytoplasm one after another. The sperm nucleus moving to the egg nucleus runs faster than the one to the polar nuclei. It fuses with the polar nuclei that are moving towards the antipodal cells at the chalazal end.

精子释放前，两极核移向卵细胞的合点端；两精子释放于卵细胞与中央细胞的间隙后，先后脱去细胞质，然后分别移向卵核和极核，移向卵核的精核快于移向极核的精核；精核与两极核在向反足细胞团方向移动的过程中完成雌雄核融合。

Two polar nuclei move to the micropylar end before sperm is released in a gap between the egg cell and central cell and subsequently taking off cytoplasm one after another. The sperm nucleus moving to the egg nucleus runs faster than the one to the polar nuclei. It fuses with the polar nuclei that are moving towards the antipodal cells at the chalazal end, Images showed the fusion process of male and female nuclei and polyspermous fertilization.

精子释放前，两极核移向卵细胞的合点端；两精子释放于卵细胞与中央细胞的间隙后，先后脱去细胞质，然后分别移向卵核和极核，移向卵核的精核快于移向极核的精核；精核与两极核在向反足细胞团方向移动的过程中完成雌雄核融合。

This review introduced the study of cell cycle of male and female gametes before fertilization; discussed the question of synergid degeneration; analysed status of research into the movement of both sperm cells in degenerated synergid; and evaluated the preferential fertilization of sperm cells and the egg cell activation of angiosperms.

本文介绍了目前被子植物精、卵细胞融合前后的细胞周期变化、退化助细胞的功能、精细胞在退化助细胞中迁移的研究动态、精细胞的倾向受精和卵细胞的激活等被子植物受精生物学领域中的一些新的研究成果和发展趋势。

Ultrastructurally, the chalazal border of the mature egg cell demonstrates regularly discontinuous regions in which exist a great number of single or double-membrane vesicles.

卵细胞中的质体多含淀粉粒，精细胞中的质体均不含淀粉粒。DNA荧光显示，卵细胞质中具丰富的类核并可以断定环状类核为线粒体DNA。

The soluble protein content decreased during embryonic development. Vitellin was a main component of soluble proteins. Besides, there were other soluble protein subunits such as 243 ku, 181 ku, 67 ku, 54 ku and 31 ku proteins.

可溶蛋白的含量在胚胎发育过程中逐渐降低；在成熟卵细胞和胚胎期，可溶蛋白在组成上以89ku和100ku的卵黄磷蛋白(Vitellin， Vn)为主，同时还存在243ku、181ku、67ku、54ku和31ku等其他一些蛋白亚基。40ku蛋白亚基仅出现在成熟卵细胞中，推测可能参与执行了特定的生殖功能。

Basketball as birth control: the sublimating trajectory of ball to hoop cartooned the urgent, intimate quest of sperm to ovum—and, so to speak, contracepted it.

用篮球来控制生育：球投向篮圈的轨迹漫画式地表现了精子射向卵细胞这一本能的急切的需求—从而避免了卵细胞受孕。

In the negative and interrogative forms, of course, this is identical to the non-emphatic forms.

。但是，在否定句或疑问句里，这种带有"do"的方法表达的效果却没有什么强调的意思。

Go down on one's knees;kneel down

屈膝跪下。。。下跪祈祷