产生精子的

They are hermaphrodites who produce both eggs and sperm but while they are able to reproduce asexually, they do usually mate with other giant snails.

它们是雌雄同体，可以同时产生精子和卵子。不过虽然它们可以无性繁殖，它们仍喜欢在繁殖时有其它的巨蜗牛做伴。

It is a complex process involving cell division, differentiation and interaction between cells in the microenvironment of the seminiferous tubule.

睾丸生精小管中的生精细胞先后经过三个阶段的变化：精原细胞的增殖，精母细胞的减数分裂和精子细胞的变态过程，最终产生成熟的精子。

The Newcastle study, by Dr Corry Gellatly, is strong evidence that there is a genetic component.

杰拉特医生说，可能是遗传的差别影响男人产生的带X和Y染色体精子的相对数量。

Excessive intra-abdominal temperature is not conducive to sperm production, testicular malignant risk also increased significantly.

腹腔内过高的温度不利于精子的产生，睾丸恶变风险也大大增加。

Of, relating to, or designating the sex that has organs to produce spermatozoa for fertilizing ova.

雄的，公的：属于、表明是或与某种性别有关的，此性别具有能产生使成熟卵子受精的精子的器官

The results showed that the electrophoretogram patterns of isozymes, serum and muscle protein of Bumper crucian carp were the same as those of its female parent and significantly different from its male parent.

结果发现：异源子代的血清、肌肉蛋白和同工酶的电泳图谱与母本彭泽鲫相同而与父本海鲤显著不同，推测异源精子的作用可能是在DNA水平上对后代产生影响，这种影响没有表现在成体同工酶的表达上。

For further studying the genetic mechanism of the reproductive isolation phenomenon of interspecific hybrid, paraffin sections of testes from 13 sexually mature male mules (Equus asinus×Equus caballus) and 12 hinnies (Equus caballus×Equus asinus) were prepared, and the samples of Giemsa meiosis and AgNO 3 synaptonemal complexes were observed and compared with spermatocyte meiosis of horse and donkey under light microscope and electronic microscope.

为了进一步探讨种间杂种生殖隔离现象的遗传机理，本研究采用性成熟公骡的睾丸为材料，制备组织切片和减数分裂联会复合体标本进行观察，发现个别性腺发育较好的个体虽然减数分裂存在大量异常，但确有少数精母细胞完成了减数分裂并产生精子。

This indicates that under the condition of physiological climax, men and women can produce good-quality sperms and ovums respectively. It is the objective existence that cannot be changed by people's thoughts.

这说明人类在生理高潮期的条件下，男性能够产生优质的精子和女性能够产生优质的卵子，这是不以人的意志为转移的客观存在。

Dr Allan Pacey, a senior lecturer in andrology from the University of Sheffield, said that if soy genuinely had a detrimental effect on sperm production, fertility might well be affected in those regions, and there was no evidence that this was the case.

谢菲尔德大学的男科专家艾伦·佩西博士说，如果大豆真的对精子的产生有决定性影响的话，那么亚洲地区的生育繁殖就会受到影响，但是并没有证据显示这一点。

Neutering, of course, removes the ability of the male to produce sperm making successful mating impossible.

绝育的，当然，删除的能力的男性产生精子，使成功的交配是不可能的。

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。