精子形成

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。

Double fertilization The fusion of one pollen nucleus with the egg to form the zygote and of the other pollen nucleus with a polar nucleus to form the triploid endosperm nucleus.

双受精：指花粉粒中的一个精子与胚珠中的卵细胞结合形成受精卵，另一个精核与极核结合形成三倍体的胚乳核。

There formed segregating cavities between spermatocyte cell-wall and spermogonium cell-wall and osmiophillic layers outside spermatocyte cytoplasmalemma, which indicated that the spermatocytes had begun to gradually break away from the male gametophytes and embark on independent development.

精母细胞与精子器的璧细胞之间形成了分离腔，在精母细胞质膜外形成了嗜锇层，这些结构的形成说明精母细胞已经开始与雄配子体逐渐分离，进入独立发育的阶段。

The function of RSS has not been demonstrated clearly, considering it functions in maintaining sperm, forming copulatory plug, relating to form seminal fluid and/or attracting females during courtship.

有关这一结构的生理功能尚不完全清楚，曾有学者提出几种假设：具有支持和激活精子的作用，形成交配栓，与精液形成有关或提供求爱信息素等。

The locomotory apparatus that emerges during the spermiogenesis consists of the multilayered structure, basal bodies, flagella and accessory structures.

精子发生过程中形成的运动器的各部分结构包括鞭毛、基体、多层结构及附属结构；基体是细胞中新形成的结构，在不同类群的蕨类植物中分别由双中心粒、分支生毛体和生毛体产生。

Spermatogenesis is the process by which spermatogonial stem cells divide and differentiate to produce sperm.

精子发生是由精原细胞增殖分化形成精子的过程，这一复杂的过程受到多种蛋白质的调节。

The fertilization was processed by sperm in mature male gametophyte combining with egg cell on the top of archegonia on June 15 or so.

摘要樟子松发育成熟的雄配子体中的精子6月15日左右在颈卵器中上部与卵细胞结合，进行受精作用，其后，受精卵进行游离核分裂，形成8个子核时，开始形成细胞壁。

The present study is involved in the expression of vitronectin , a ligand of integrin, on human spermatozoa and its role in fertilization; the expression of integrin α〓、α〓、β〓 sbunits on human and mouse oocytes and their relationship with maturation of oocytes; the reorganization of cytoskeletal protein, actin, of mouse oocytes mediated with RGD peptide binding with integrins; the roles and mechanisms of integrins in activation of mouse oocytes as trasmembrane signaling receptors, using the methos of cell culture, immunohistochemistry, flow cytometer, laser confocal microscope.

本课题采用细胞培养、免疫组化、流式细胞术、激光共聚焦显微技术进行以下四个方面的研究：整合素配体玻连蛋白在人精子的表达及其与精子功能状态及受精的关系：整合素〓在人、小鼠卵的表达及其与卵的成熟程度的关系：整合素介导小鼠卵内actin骨架蛋白的重组；整合素介导卵激活的早、晚期事件，包括卵细胞内钙离子浓度的变化及孤雌发育胚的形成，并探讨其机制。

When sperms and eggs are formed, only one of each chromosome pair enters the sperm or egg.

当精子和卵子的形成，其中只有一个，每个染色体配对进入精子或卵子。

They are the result of two sperm cells fertilising a single egg, which then divided to form two embryos - and each sperm contributed genes to each child.

他们是两个精子细胞与一个卵子结合的结果，结合后的卵子分裂形成了2个胚胎——各自精子对各自幼儿提供基因。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。