不育

Results of interpopulation crossing test of mating, fertilization rate, embryo growth and hatchability under the condition of cage feeding indicated that:(1) due to difference in body size, morphology, habits and characteristics and reproducing season, crossing fertility between wild Japanese quail in China and domestic quail population was lower than that of intrapopulation mating, but fertilized egg through reciprocal crossing could be incubated and produced F1 without prezygotic isolation;(2) crossing of wild male quail ?female small-type domestic quail produced the best effect among all combinations of reciprocal crossings.

通过关于笼饲环境下交配行为、受精率、胚胎发育、种蛋孵化率的种群间杂交试验证明：由于体量、形态、习性、繁殖季节性的差异，我国境内的野生日本鸣鹑与家鹑群体之间的杂交能育性低于同种群交配水平，但可以实现正、反杂交，产生受精卵、孵出杂种一代，不存在合子前生殖隔离；在正反杂交组合中，以野雄鹑X小型雌家鹑的效果最好。

After fencing, disturbance will be removed and plant community transform from annual plants to secondly stable shrub or relatively stable steppe, and biodiversity also increase, ecosystem tend to be more stable. Soil develop from mobi

围栏封育，干扰源消除，群落逐渐由不稳定的一年生植被向次稳定的灌丛化植被和相对

With the social change,the pattern and the content of traditional education on morality in primary school have not been suitable with the social reality.

德育是学校各育之首，在学校教学中处于首要的、核心的地位。在当前社会变革中，面对小学传统德育教育模式和内容对社会现实的不完全适应，社会传媒及网络对学校德育的负面影响，如何做好小学德育工作，使小学生迈好人生的第一步，打下扎实、良好的道德品质基础，成为迫切需要我们解决的一个重要课题。

First nymph will get into buds to feed germen by piercing-sucking mouthpart as soon as hatched, which stop flowering and make it becoming galls. From first to 3th nymph complete their development in flower-galls. They have a low death-rate since protection of galls. the 4th nymphs were observed in the end of July at the moment that the period of summer-diapause may begin.

孵化后的初龄若虫即进入未开放的花苞内以刺吸式口器取食子房，致使花苞不能开放而成为虫瘿。1—3龄若虫在花部虫瘿内完成发育，死亡率较低，至7月底发育到4龄若虫时开始夏滞育。

Epithelial cells of hepatopancreas and midgut, and male and female reproductive system were not sensitive to the WSSB...

WSSBV对中肠和中肠育囊上皮细胞，肝胰腺上皮细胞，雄性生殖系统精原细胞，输精管上皮细胞等不敏感。

During the period between 1984 and 1985, seedling at 4 leaf stage of 62 rice varieties were inoculated with isolate 75 49 of Pyricularia oryzae Cav.

对构成慢瘟性的组分分析发现，慢瘟性与侵染频率和单病斑产孢量星负相关(r=0.98和r=—0.81)，但与潜育期不相关。

They weren't aggressive, but I yelled and threw a rock in their direction to get them off the trail and away from me, just in case.

他们没有侵略性，但我大喊，并在他们的方向扔石头让他们过的线索，远离我，以防万一。

In slot 2 in your bag put wrapping paper, quantity does not matter in this case.

在你的书包里槽2把包装纸、数量无关紧要。