精子发生的

Spermatogenesis is the name given to the process that occurs in the seminiferous tubules, which produces sperm. This process goes on all the time from the onset of puberty, in fertile males.

精子发生的名称是考虑到过程，是发生在曲细精管，产生精子，这个过程继续下去，所有的时间从一开始就青春期，在肥沃的男性。

According to the change of chromatin and morphology of cells, the spermatogenesis could be divided into five stages: spermatogonium, primary spermatocyte,secondary spermatocyte, spermatid and spermatozoon.

利用透射电镜观察秀丽白虾的精子发生，并根据染色质及细胞形态的变化将精子发生的全过程划分为五个时期，即精原细胞、初级精母细胞、次级精母细胞、精细胞和精子。

Sex hormone is one of factors that regulate Spermatogenesis.

精子发生是发育生物学的重要内容之一，性激素对精子发生的调节是一种重要的调节方式。

The cloning and identification of these genes are of great value to elucidate the mechanism of spermatogenesis and spermiogenesis.

发现并研究精子发育不同阶段表达的基因及其调控因子，深入研究它们在精子发生中的作用，将有助于阐明精子发生的机理，为探索不育机理和寻找免疫避孕的新途径奠定理论基础。

The cloning and identification of these genes are of great value to elucidate the mechanism of spermatogenesis and spermiogenesis. Such study can also provide foundation and cues to investigate the mechanism of infertility and immunocontraception.

发现并研究精子发育不同阶段表达的基因及其调控因子，深入研究它们在精子发生中的作用，将有助于阐明精子发生的机理，为探索不育机理和寻找免疫避孕的新途径奠定理论基础。

The identification and study of the control factors that regulate gene expression at different stages are of great value to elucidate the mechanism of spermatogenesis and spermiogenesis. Such study can also provide foundation and cues to investigating the mechanism of infertility and immunological contraception.

作为体内高度分化的雄性生殖细胞，精子发生过程中经历了从形态到生化的复杂变化，在这一过程中有一系列的特定基因按严格的时空顺序转录和翻译，因此寻找和研究不同发育阶段的差异表达的基因，将有助于最终阐明精子发生的机理，并为控制生育和不育机理的探索提供新的线索。

Spermiogenesis is a crucial process for germ cell formation, which ensures the efficient transmission of the paternal genome by the spermatozoa to the ooctyte at fertilization.

它包括染色质的压缩、顶体和鞭毛的形成以及去除多余的细胞质，是精子发生的一个重要环节，确保了成熟精子具有正确的形态和完整的功能。

These data suggested that the centrin isoforms played different roles in different stages of spermatogenesis. The centrin-1 gene was revealed to be relevant to the centriolar translocation to the posterior pole of cell and the elaboration of flagellum during spermiogenesis, while the centrin-2 and centrin-3 might play roles in spermatogonial mitosis but were not involved in the spermatid differentiation process.

这些结果提示，Centrin同源基因在精子发生的不同阶段发挥不同功能，其中Centrin-1与精子细胞分化期的中心体后移、鞭毛的生成及精子中轴形成可能密切相关，Centrin-2和-3则可能在精原细胞有丝分裂中起作用，而与精子细胞变态分化无关。

In the female, ER was distributed in the nucleus of oogonia cytoplasm and membrane of early primary oocytes.

因此，可以认为雌性激素ER结合唤醒了&休眠&的卵原细胞和精原细胞，细胞核发生一系列成熟分裂期的变化，从而启动了卵子和精子发生的开始。

Tpap is an age-dependent gene in mouse testis. The expression of Tpap corresponds to the appearance of spermatids of mice and indicates that Tpap may have an important role in male mammalian spermatogenesis.

结果表明，Tpap基因为小鼠年龄依赖性表达基因，小鼠Tpap的表达与小鼠精子发生的过程有很强的一致性，推测该基因在哺乳动物精子发生中起重要作用。

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。