精子的

He allowed these "enucleated" eggs to be fertilized by sperm from sea urchins of the genus Echinus.

他让这些"无核"的卵跟海胆属的海胆的精子受精。

"These results may mean that men player a greater role in fertility than previously suspected, and that ejaculatory frequency is important for improving sperm quality," said Greening.

"这些结果可能意味着，男女球员中发挥更大的作用生育率超出了以前的猜想，并射精频率是非常重要的改善精子质量，说："绿化。

In addition, these results may mean that men play a greater role in infertility than previously suspected, and that ejaculatory frequency is important for improving sperm quality, especially as men age and during assisted reproduction cycles, said Greening.

此外，这些结果可能意味着男子中发挥更大的作用比以前不孕怀疑，而且射精频率是非常重要的改善精子质量，尤其是男子的年龄和在辅助生育周期，说：绿化。

Only using sperm that carry an X chromosome to fertilise the egg means only unaffected girls are conceived.

只选择带有X染色体的基因的精子进入卵子。也就是说生一个没有缺陷的女儿。

The journey sperm undertake on their way to fertilise an egg has been likened to a human trying to swim a journey of several thousand kilometers.

我们可以把精子对于卵子受精的旅程形容为一个人试着游上千公里的的距离。

In this procedure the woman's egg is fertilized by the man's sperm outside the body and then implanted in the uterus.

这一常规的做法是将女人的卵子在体外与男人的精子结合，然后将其植入子宫。

She didn't make love with anyone and she have just swam in hotel in Poland.So his mather was sure that her daughter has fetation as a man swimming in hotel.

凯特称她从未和人发生过性关系，并且她在埃及旅游时，只在当地一家宾馆的游泳池中游过泳，因此马格达莱娜坚信是游泳池中的某个男性的精子让女儿怀了孕。

Objective: In order to approach the infectious status of gonococcus, chlamydia trachoma-tis, urealyticum mycoplasma and which affect on quality and function of sperm.

目的：探讨男性不育症精液的淋球菌、沙眼衣原体、解脲支原体感染的情况及其对精液质量和精子功能的影响。

Morphology of the male reproductive system, chromosome behaviors during meiosis and spem tail structures in Homoptera and Heteroptera are compared in this paper.

本文比较了同翅类昆虫雄性生殖系统的结构、减数分裂期间染色体的行为和精子尾部的超微结构。

The crab homunculus produced from h is sac of semen and sea-water was very far from the perfect,vicious child he' d hoped to produce: a hymn to the glories of testosterone.

虽然这个从充满精子和海水的人造子宫中降生的小家伙远远没有达到他心目中完美邪恶的要求，但这又有什么关系呢？

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。