产生精子的

Follicle Stimulating Hormone and Luteinizing Hormone play a crucial role in the oogenesis and spermatogenesis of vertebrates.

可能调节繁殖蚁、兵蚁、工蚁的产生。这是首次证实FSH和LH在白蚁脑中的存在及分布，为揭示其在昆虫精子和卵子发生过程中的分子机制提供了直接证据。

Renee Reijo Pera, a biologist at Stanford's Institute for Stem Cell Biology and Regenerative Medicine, points out that earlier attempts to create offspring with sperm from embryonic stem cells resulted in short-lived mouse pups that were either giants or midgets.

斯坦福干细胞生物与再生医学研究所的生物学家雷妮·雷霍·派拉指出，以前曾尝试用胚胎干细胞培育的精子来繁殖后代，结果所产生的幼鼠寿命短暂，而且体形不是特大就是特小。

The locomotory apparatus that emerges during the spermiogenesis consists of the multilayered structure, basal bodies, flagella and accessory structures.

精子发生过程中形成的运动器的各部分结构包括鞭毛、基体、多层结构及附属结构；基体是细胞中新形成的结构，在不同类群的蕨类植物中分别由双中心粒、分支生毛体和生毛体产生。

And because only healthy sperm would be used to conceive a child, the scenario allays safety

因为只有健康的精子才会被用来繁育后代，这一设想就平息了一些人对安全的担忧，如基因修补自身可能会产生一些问题，例如出生时的缺陷。

And because only healthy sperm would be used to conceive a child, the scenario allays safety worries -- for example, that the genetic "fixes" might cause problems of their own, such as birth defects.

因为只有健康的精子才会被用来繁育后代，这一设想就平息了一些人对安全的担忧，如基因修补自身可能会产生一些问题，例如出生时的缺陷。

With so many different creatures leaving eggs lying around waiting to be fertilised, perhaps it is not surprising that an occasional misfertilisation takes hold and produces something totally unexpected.

随着许多不同的有生命的活体把它们的卵子扔在海洋里的各个地方去等待受精，也许这并不奇怪，一次偶然的卵子接受了别的物种的精子，产生了完全意想不到的某些生物品种。

During his fertile years, a man's gonads every day produce the

在男性的生育期，他的生殖腺每天产生的精子数量是

We determined net male genetic effects on female and offspring fitness in a seed beetle and then tested whether fertilization success was biased in favor of high-quality male genotypes in double mating experiments.

研究人员惊奇地发现，当雌性豆象与2个雄性豆象交配的时候，那个&低品质&的雄性豆象的精子会比&高品质&豆象育出更多的后代（用仅交配一次后所产生的后代的数量来衡量）。

One of these "daughter" cells is a new sperm producing cell, whilst the other cell further divides to form two new cells, each with only one member of each chromosome pair. As the unfertilised egg also contains only one member of each chromosome pair, the act of fertilisation re-institutes an embryo with 46 chromosomes.

之一，这些&女儿&细胞是一种新的精子产生细胞，而其他细胞的进一步分裂，形成两个新的细胞，每个只有一个成员，每一个染色体的配对，由於unfertilised鸡蛋也只包含一个成员，每一个染色体的配对，该法的受精重新研究所胚胎与46染色体。

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。