查询词典 genetic code

In order to explore the grain-size distribution characteristics and geo-genetic types of land desertification in Mo Us desert, the research on the grain-size characteristics of sediments since late Pleistocene has been carried out in the desert area and neighboring area such as inside desert, sand covered loess plateau, loess plateau and river valley. The research result shows that sediments of different geologic genetic types are the fundamental material source of sandy desertification in these areas and the distinguishing of different types of the sediments is the theoretical basis of classification of different geogenetic type of sandy desertification. The contribution of different geological roles on the land desertification and its significance to prevent and deal with the land desertification have also discussed.

为了研究毛乌素沙地沉积物的粒度特征与土地沙漠化的地质成因类型，通过系统研究沙地及相邻地区晚更新世以来在沙地内部、覆沙黄土区、黄土高原和河流谷地与湖泊等不同地质构造地貌条件下所形成的沉积物粒度特征，指出不同地质成因类型的沉积物是这些地区土地沙漠化的物质基础，区分不同类型的沉积物也是构成不同地质成因类型土地沙漠化分类的理论基础，探讨了不同地质作用对土地沙漠化的贡献及其对土地沙漠化防治方面的意义。

The minerogenetic geotectonic background of typical copper deposits is proved according to the geotectonic evolution,genetic type of deposit, the genetic type of metallogenic mother rock and metallogenic epoch, and the results show: Gongpoquan volcanic rock type copper deposit formed in late eu-geosyncline phase, Gongpoquan porphyry copper deposit formed in orogenic phase, Baishantang copper deposit formed in geosynclinal phase.

综合考虑区域大地构造演化史、矿床成因类型、成矿母岩岩石类型及成岩成矿时代来论证北山地区典型铜矿床成矿大地构造背景，结果表明公婆泉铜矿区斑岩型铜矿形成于褶皱造山期、火山热液型铜矿形成于优地槽期，白山堂铜矿形成于地槽期。

At the same time information index showed genetic diversity index (0.3456) of great ball horned toad Wrinkle is greater than that (0.3456) of Eulecanium gigantean Shinji big balls horned toad.This shows the genetic diversity of big ball horned toad Wrinkle is rich .

扁平球坚蚧在白蜡和刺槐两种不同寄主植物种群之间存在一定程度的差异，这种差异与扁平球坚蚧的生物学习性和寄主植物有关。

On the other hand, gonochoristic reproduction produces abundant genetic variation, and creates genetic diversity.

研究还表明，两性生殖方式为银鲫种群提供了丰富的遗传变异，创造了银鲫的遗传多样性。

Second, a lot of artificial propagation experiments were performed between different gynogenetic clones to analyze whether or not genetic recombination occurs by utilizing the identified RAPD and SCAR markers. Direct molecular genetic evidence for gonochoristic reproduction was revealed in the gynogenetic silver crucian carp, and a previous hypothesis that the silver crucian carp might reproduce both gynogenetically and gonochoristically was conformed.

二是利用银鲫的克隆多样性和其种群中存在的雄性个体，设计大量的不同繁育组合，运用已鉴定的RAPD和SCAR分子标记，分析比较了不同繁育组合子代的DNA扩增情况，探讨了这些分子标记在各个交配子代中的重组分布规律。

Simple sequence repeat was used to determine the DNA genetic relationships in genetic marker line of upland cotton Gossypium hirsutum L.

利用SSR标记对陆地棉遗传标准系TM-1及其转激素基因后代材料进行DNA指纹分析。

Key words pomegranate; Punica granatum ; AFLP marker; genetic diversity; genetic relationship

根据AFLP结果探讨了山东石榴品种的亲缘关系与新品种选育的前景。

This conclusion provides an explanazation for the genetic connection between granitoids and gold deposits. It shakes the traditional but still prevalent viewpoint of taking a close spatial relation between granitoid and gold deposits as a genetic connection.

这一认识为花岗岩与金矿的成因关系提供了一种解释，动摇了目前流行的把金矿与花岗岩密切的空间联系当作成因关系的传统认识。

A genetic epidemiologic case-control study including 407 pedigrees(249 cabes and 158 controls)was car-ried out to estimate the segregation ratio and the hereditability(h￣2)of esophageal cancer by using the methodof Li-Mantel-Gart and Falconer,respectively,and to compare the genetic epidemiologic features from theother cancers.

本文通过遗传流行病学病例对照研究，对淮安407个家系（249个先证病例，158个对照），应用Li－Mantel－Gart和Falconer方法分别进行了分离比、遗传度估算及比较流行病学研究。

Comparing the genetic diversity of Coreius heterodon with that of other fishes, the experiment revealed that the genetic diversity of Coreius heterodon in the lower reach of the Yangtze River was a little lower.

通过与其他鱼类的遗传多样性的研究结果比较可初步判断，长江下游铜鱼群体的遗传多样性较低。

For the head-teacher of the class said that I had seriously broken the school rules,which led me to a three-day suspend class.

为什么呢？因为我的班主任说我严重的违反了校规，于是让我停课三天。

Many of them believe that the conversion of thousands of working-class folk in England spared that nation from the mass carnage and the tyranny that came with the revolution in France.

他们之中有许多人相信，在英国数以千计的劳工阶级之悔改信主使英国免於遭受如法国大革命所造成的大屠杀和专制暴政。