说明原因

Accordingly we start from the definition of heterosisH=F1-MP,where H is heterosis, F1 is the first generation offspring, MP is the mean of the parents or midparent, and from the use of a binomial random variable and its extention to the multinomial case derive the basic relations of heterosis with its components.

另一在原文中未加说明的原因是，用配合力概念需要无穷多个品系才能和遗传力的结果相比较，仅此一点就把配合力的作用排斥掉了。文中的主题是杂种优势老大难题可以用笛卡尔的推理方法来解决。

Moon away 虚度时光 over the moon 欣喜若狂 moon-faced 圆脸的 moonhead 笨蛋;傻瓜 http://www.chinadaily.com.cn/language_tips/trans/attachement/jpg/site1/

它不构成后面句子的一个语法成分，却在意义上与它有关连，后面的句子一般说明这种情绪的性质、原因。

Based on above studies, some main conclusions were obtained as follows : 1 the diatoms forming mats in low latitude west pacific is"shade flora"diatom Ethmodiscus rex Hendey; 2 the sites found diatom mats are zone distributed, the direction is NW-SE and most distribute in the deep water area with flat seafloor, between 17°N～20°N and the water depth 4837-6150 m below Carbonate Compensation Depth (CCD 3) AMS 14C dates show that the sediments rich in diatom mats occurred during 16.0 ~ 28.6 ka B.P., which means the bloom mainly occurred in last glacial maximum, while there are not diatom mats deposits in other layers; 4 A total of 101 diatom taxa belonging to 40 genera had been identified from the 155 samples in the two cores WPD 03 and WPD 12, and the relative percentage of Thalassionema frauenfeldii are the highest, Thalassionema nitzschioides、Azpeitia nodulifera、Hemidiscus cuneiformis、Nitzschia marina take the second place.

14C年期间，即&勃发&发生于末次冰期最盛期；4在WPD 03和WPD 12两个岩芯共155个样品中共鉴定硅藻40属101种，且Thalassionema frauenfeldii的相对百分含量最高，Thalassionema nitzschioides、Azpeitia nodulifera、Nitzschia marina、Hemidiscus cuneiformis等次之，这五种硅藻占整个硅藻物种相对百分含量的85%左右，说明在该海域表层水体硅藻席沉积过程中，这五种硅藻最容易与成席硅藻在同时期的环境中生存，形成勃发；5MIS3期的晚期，该区域表层海水盐度降低，这有助于该区水体的成层化，从而使&树荫种&硅藻开始勃发，导致&秋季倾泻&；6末次冰期由于南极中层水北扩，南大洋中层水将富含硅酸盐的海水带入了研究区，即南大洋的&硅溢漏&作用，使该区域硅藻得以勃发，同时，铁输入的增多，可能也是造成硅藻勃发的主要原因之一。

The Vg-negative reaction of the triploid female rainbow trout could not provide full evidence for the impossibility of liver to synthesize Vg. That Vg was not synthesized resulted from insufficient estradiol due to the retardation of ovaries development, the un-differentiation of follicular cells and the lost interaction of germ cell and somatic cells. It could be concluded from yolk genesis that the shortage of female triploid rainbow trout's Vg resulted from the abortive ooecium, but did not result in sterility.

由于三倍体雌性虹鳟卵巢发育受阻，无滤泡细胞分化，生殖细胞与体细胞的互作缺失，不能分泌足量的17β-E2以诱导Vg的合成，因而肝脏的Vg阴性并不能说明肝脏不具备合成Vg的能力，从卵黄发生的角度分析，卵黄蛋白原的缺乏不是导致三倍体虹鳟雌性不育的原因，而是其卵泡败育的结果。

This indicates that the development of pathologic diagnosis has promotive significance to modern medicine.

说明病理诊断的发展对现代医学具有很大的推动作用，并同时提出病理误诊的原因、后果及减少误诊的措施。

This article reports a 10 years'(1980-1989) survey of Chlamydia psittaci infection in 19 species of animals including 127,899 diseased animals.The survey showed that chlamydiosis was one of the main causes of abortion in goats and sheep after brucellosis had been under control in Xinjiang province.

本文报道从1980年～1989年10年中，在新疆阿勒泰、阿克苏、巴州等15个地州市、86个县、426个乡、15个种畜场的19种动物和127899头动物鹦鹉热衣原体病调查，并通过衣原体、弓形体和布鲁氏菌病对比调查说明，新疆布病控制后，衣原体是引起山、绵羊流产的主要原因之一。

All of these had shown that the induced resistance could be transmitted.Oligosaccharides had not shown any direct activity against Puccinia striifomis in vitro. This suggests that Oligosaccharides can elicit resistance to diseases of wheat, and are different from common pesticides.

不同浓度(25ppm、50ppm、100ppm)的5号提取物的体外抑菌试验表明，低聚糖对条锈菌没有明显的抑制作用，说明低聚糖不具有直接杀菌或抑菌作用，使小麦产生抗锈性的原因在于诱发寄主植物的抗病潜能，使植物本身产生对病原菌的抗性，这与普通杀菌剂显然不同。

The second chapter: illustrate the causes of the contemporary female querimony from the two major aspects and the six small sides.

第二章：从两个大方面六个小方面来说明当代闺怨产生的原因。

However,compared to Cd~(2+) stress alone, treatment of SNP+Cd~(2+) caused more increases in SOD,CAT and POD activities, a decrease of H_2O_2 level and MDA content in leaf and root ofmung bean seedlings. These results indicated that exogenous NO induced increases inSOD, CAT and POD activities, which scavenged H_2O_2 and resultantly inhibitedmembrane lipid peroxidation in leaf and root of mung bean seedlings under Cd~(2+) stress.

说明NO通过诱导膜保护酶活性的提高，降低了活性氧水平，从而使Cd~(2+)胁迫诱导的膜脂过氧化程度降低，这可能是外源NO明显缓解Cd~(2+)胁迫抑制绿豆幼苗生长发育的原因之一。

Based on these results, it was concluded that in conditions where eye movements are needed, besides saccadic suppression, the higher central system must calculate and control the eye movements, which affects its capacity to process the text information.

通过固定窗口显示方式和知动窗口显示方式条件下中文阅读的比较，排除了强迫阅读的因素，说明有无眼动是产生阅读速度差异的主要原因；根据以上实验结果，可得出结论，在有眼动的情况下，除了saccade抑制影响阅读和识别外，主要的因素在于高级中枢对位置信号的处理，眼动的驱动控制及运动过程影响了高级中枢对阅读内容和识别内容的解码速率。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。