精子的

It is the bearing rules and common senses having been recognized by human beings for a long time, that only during the ovulation period and after the sexual behavior, can the sperm and ovum can meet and can ovum be fecundated.

人类生育有效性交，是在女性排卵期。只有在女性的排卵期，男女合房性交，男性的精子和女性的卵子才相遇，女性卵子才能受精，这是早已被人类认识了的生育规律和常识。

Cows are commonly artificially inseminated with semen from one of the large beef breeds.

母牛所要面对的另一处境是，牧农会从体型高大的种牛身上提取精子，以人工授精的方式让他们受孕，以生产更多高价值的小牛。

Choose rotting away at the end of it all, pishing you last

选择在这一切的末尾烂掉，最后在一个破破烂烂的家里遭儿女唾弃，当初你用精子弄出他们来代替你，现在对这些自私的、满不在乎的小子们来说，你只是一个老厌物。

Choose rotting away at the end of it all, pishing your last in a miserable home, nothing more than anembarassment to the selfish, fucked-up brats you spawned to replaceyourself.

选择腐朽，由你精子造出取代你的自私小鬼，可以说是最无耻的事了。选择你的未来，你的生活。但我干嘛要做？

Choose rotting away at the end of it all, pishing you last in a miserable home, nothing more than an embarrassment to the selfish, fucked-up brats you have spawned to replace yourself.

选择在这一切的末尾烂掉，最后在一个破破烂烂的家里遭儿女唾弃，当初你用精子弄出他们来代替你，现在对这些自私的、满不在乎的小子们来说，你只是一个老厌物。

Choose rotting away at the end of it all,pishing your last in a miserable home,nothing more than an embarassment to the selfish,fucked up brats you spawned to replace yourself.

选择在这一切的末尾烂掉，最后在一个破破烂烂的家里遭儿女唾弃，当初你用精子弄出他们来代替你，现在对这些自私的、满不在乎的小子们来说，你只是一个老厌物。

Choose rotting away at the end of it all, pishing you last in a miserable home, nothing more than an embarrassmentto the selfish, fu*ked-up brats you have spawned to replace yourself.

选择在这一切的末尾烂掉，最后在一个破破烂烂的家里遭儿女唾弃，当初你用精子弄出他们来代替你，现在对这些自私的、满不在乎的小子们来说，你只是一个老厌物。

Choose rotting away at the end of it all, pishing you last in a miserable home, nothing more than an embarrassment to the selfish,***ed-up brats you have spawned to replace yourself.

选择在这一切的末尾烂掉，最后在一个破破烂烂的家里遭儿女唾弃，当初你用精子弄出他们来代替你，现在对这些自私的、满不在乎的小子们来说，你只是一个老厌物。

Sexing technology is a very important research projects and directions in animal reproduction biology which can control the sex ratio by sperm or embryo sex determination.

性别控制技术已经成为繁殖生物学中重要的研究课题和研究方向，哺乳动物的性别控制是指通过对精子或胚胎的性别鉴定以达到调控子代性别的目的。

The sexual gland of triploidfemale abalones can generate oocytes,though thedevelopment of sexual gland was subjected to greatinhibition.

但是，三倍体雄鲍的生殖腺中有极少数成熟精子，而且比三倍体雌鲍呈现出较好的性腺发育状况；三倍体雌鲍的性腺发育虽然受到了很大抑制，但仍有形成卵母细胞的能力。

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。