精子的

It takes about 0.5 h for a pollen tube from germination to arrive at the micropyle. About 0.5 h after pollination, the pollen tube releases two sperms into one synergid. At 0.5-2.5 h after pollination, the egg cell fuses with one sperm to form a zygote. About 10.0 h after pollination, the division of the zygote begins. The duration of the zygote lasts about 2.5-10.0 h. However, one sperm nucleus fuses with two polar nuclei at 1.0-3.0 h after pollination, and 5.0 h after pollination the primary endosperm nucleus begins to divide.

水稻受精过程经历的时间表如下：授粉后，花粉在柱头萌发；花粉萌发至花粉管进入珠孔大约需要0.5小时；授粉后0.5小时左右，花粉管进入一个助细胞，释放精子；授粉后0.5-2.5小时，精卵融合形成合子；授粉后约10.0小时，合子第1次分裂，合子期为授粉后2.5-10.0小时；授粉后1.0-3.0小时，精核与两极核融合；授粉后约5.0小时，初生胚乳核分裂。

Spermatogenesis of teleost and its prospective application in the study of phylogenetic development.

硬骨鱼类精子发生及其在系统演化研究中的应用前景

Second-generation test-tube baby technology is applicable not only to female tubal infertility, but also to help address the low quality of the sperm of male infertility caused.

第二代试管婴儿技术则不仅适用于女性输卵管不孕症，还能帮助解决因男性精子质量低下导致的不孕。

Objective:To evaluate the expression of COX10 mRNA in the testes of non-obstructive azoospermia patients and normal men.

目的：评价细胞色素氧化酶10(COX10)基因在非梗阻性人无精子症及正常睾丸组织中的表达及意义。

On the other hand, various methods of isolation of spermatids from testis are available.

另一方面，已经报道了多种不同的方法可从睾丸中分离精子细胞。

In order to elucidate the regulation of proteolysis during spermatogenesis and maturation, expression of tissue-type PA and PAI-1 in testis and the accessory organs of rat has been investigated.

为探讨精子发生及成熟过程中蛋白水解酶调节机制，我们以大鼠为模型对组织型PA和PAI-1在睾丸及附性器官中的表达作了初步研究。

The sperm can be stored in the sperm storaged tubule which lies in the uterovaginal junction more than 24 days.

精子在黄腹角雉雌体内的贮存时间可以达到20天以上。

For an unassisted fertilization to occur, the number of sperm in one ejaculation

为达到自主受精，一次射精的精子数量至少必须达到

Results In the group of 67 cases treated with high ligation by laparoscopy,the scrotum discomfort of left scrotum was lightened obviously after operation of 2～4 days in 60 cases,the expanding varicosity vein disappeared or was postponed obviously.In the last cases,5 cases had obvious improvement after operation of 10 days and 2 cases felt light scrotum discomfort after operation of 3 months.

结果 腹腔镜下高位结扎精索静脉组67例中，60例术后2～4天内左侧阴囊坠痛感明显改善，阴囊内曲张的精索静脉明显减缓或消失，5例在术后10天内上述症状明显改善，2例患者上述症状轻度改善，术后随访3个月左侧阴囊仍有轻度坠痛感；本组中有22例不育症患者在术后复查精液常规，精子数及活动率均明显改善。

In the group of 115 cases treated with high ligation by retroperitoneal approach,the scrotum discomfort of left scrotum was lightened obviously after operation of 2～4 days in 67 cases,the expanding varicosity vein disappeared or was postponed obviously.

结果 腹腔镜下高位结扎精索静脉组67例中，60例术后2～4天内左侧阴囊坠痛感明显改善，阴囊内曲张的精索静脉明显减缓或消失，5例在术后10天内上述症状明显改善，2例患者上述症状轻度改善，术后随访3个月左侧阴囊仍有轻度坠痛感；本组中有22例不育症患者在术后复查精液常规，精子数及活动率均明显改善。

Singer Leona Lewis and former Led Zeppelin guitarist Jimmy Page emerged as the bus transformed into a grass-covered carnival float, and the pair combined for a rendition of "Whole Lotta Love".

歌手leona刘易斯和前率领的飞艇的吉他手吉米页出现巴士转化为基层所涵盖的嘉年华花车，和一双合并为一移交&整个lotta爱&。

This is Kate, and that's Erin.

这是凯特，那个是爱朗。