产生精子的

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。

Thus, most of the energy required for sperm motility was generated by glycolysis rather than oxidative phosphorylation.

由此可见，精子活动所需的大部分能量是由糖酵解产生的，而不是氧化磷酸化。

In about 30 per cent of cases, however, there is no family history of haemophilia, these cases arise as a result of new mutations occurring in the cells that produce eggs or sperms in the parents.

在大约30 ％的情况下，不过，有没有家族病史，血友病，这些个案出现，由于新的基因突变发生在细胞产生卵子或精子在家长。

So the cellular and humoral immunological response of mice were detected by a series of experiments.

但这种表达水平能否导致小鼠产生对表达的精子膜蛋白的免疫应答，仍是一个有待实验证实的问题。

Sperm are a highly specialized cell type derived to deliver the paternal haploid genome to the oocyte.

精子是一种高度分化的细胞，其产生是为了传递父方的单倍基因组给卵子。

Histological observation showed that there were no significant differences in the gonad development cycle between hybrids and S. intermedius, and during the whole development period of gonad, only the ovary can produce few mature ovary cells and the mature sperm were not found in testis.

杂交海胆在生殖腺发育的整个过程中，生殖腺指数虽然也出现周期性的变化，但组织切片观察发现杂交海胆生殖腺发育不能象母本一样有明显分期，只有个别雌性个体能产生成熟卵细胞，雄性个体未见成熟精子。

Males, whether they are mouse or man, generate a constant supply of new sperm from self-renewing spermatogonial stem cells.

男性的人，不论是鼠标或男子，产生一个不断供应新的精子，从自我革新精原干细胞。

Moreover, the extremely slow development of gametophyte and time interval between the appearance of antheridia and archegonia resulting from the inherent physiochemical property of red soil make it impossible to fertilize and generate sporophyte.

此外，红壤固有的理化性质导致扇蕨配子体发育极其缓慢、精子器和颈卵器发生的时间间隔过长使其不能受精产生于包子体。

"Instead of growing super strength to fight for a female, they grow lots more sperm to increase their chances of fertilising her eggs and fathering the next generation."

&这种雄蜣螂会产生很多精子来增加让雌蜣螂受孕的几率，从而繁衍出下一代，而不是凭借力气来博得雌蜣螂的青睐。&

However Feng et al (1997) and Wakayama et al (1997, 1998) have first reported that followed by injection of PbI into the enucleated oocyte, which was injected into the head of sperm, and the recombinant oocyte could produce a mouse offspring with generational function.

然而，Feng等（1997），Wakayama 等（1997、1998）的研究结果证实：将PbI注入去核卵母细胞后再注入精子头部可以产生具有生殖功能的小鼠后代。

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。