产生变异

In sum, this paper testifies the accommodation theory and expose the social nature of language through the study of variation in the telephone conversations.

本文共分六部分：一、简介，简要介绍电话会话研究的发展过程以及本项研究的目的、意义以及创新性；二、文献综述，概括总结前人的研究，从中得到启示；三、理论框架，本文采用的理论框架为变异研究与话语文化学的有机结合；四、研究方法，介绍本项研究的语料收集方法和研究方法；五、研究结果及分析，该部分是本文的核心，在这一部分呈现了对电话的开端，主体，结尾三个部分的语言变量的变体进行的描述以及对制约它们的社会变量的分析阐释，研究表明在Hymes的话语文化学理论框架SPEAKING的八大因素中，场景、参与者、目的、基调、媒介是导致变体产生的主要社会变量；六、总结。

The thesis also draw several conclusions as follows:(1) Orthogonal experiment design method can be viewed as a special case of genetic algorithm, i. e. a genetic algorithm with a fixed initial population, an oriented-mutation operator and one evolution epoch.(2) In terms of running steps, genetic algorithm is more complex than orthogonal experiment design method.

论文首次对正交试验设计法和遗传算法这两种独立发展起来的方法进行比较研究，提出(1)正交试验设计法是遗传算法的一种特例，即是一种初始种群固定的、只使用定向变异算子的、只进化一代的遗传算法；(2)遗传算法产生的优化解优于正交试验设计法产生的优化解，且遗传算法处理交互作用项的效率高于正交试验设计法；(3)遗传算法的步骤比正交试验设计法复杂，所需的试验次数也要多。

The adjustable amplitude range, symmetry and low ringing of the monocycle pulse are important to judge the performance of the pulse generator. Furthermore, the pulse generator should avoid the process variation and be suitable for different requirements.

目前脉波产生器的研究中，以脉波的高度可调性、对称性和低涟波为最重要，再者由於晶片中的制程变异或是需应用於不同的情况，因此目前的脉波产生器研究皆以此目标迈进。

Then they examined PTEN in nonhereditary breast tumors from 297 patients and tumors from 34 women who had inherited the BRCA1 mutation. In most cases, the protein that PTEN produces was undetectable in tumor cells, but clearly present in nearby normal cells.

然后他们检查了297名患非遗传性乳房肿瘤的妇女和34名遗传了BRCA1变异并患肿瘤的妇女，发现在大多数情况下，肿瘤细胞里检测不到由PTEN产生的蛋白质，但在附近正常细胞的周围明显存在由PTEN产生的蛋白质。

The total energy, standard enthalpy, standard entropy and standard free energy were obtained. The calculations show that 5-fluorouracil and 5-chlorouracil existing as the dione forms are the predominant isomers in the gas and aqueous phases. The entropy effect on the Gibbs free energy of 5-fluorouracil and 5-chlorouracil is very small and there is little significance for the tautomeric equilibria.

Onsager反应场溶剂模型用于水相的计算计算结果表明，5-氟尿嘧啶和5-氯尿嘧啶在气相中和水相中主要以双酮形式存在5-氟尿嘧啶和5-氯尿嘧啶的熵效应小，对互变异构平衡没有显著的影响，而焓变对互变异构产生了主要的影响。

Canalisation is divided into genetic and environmental canalisation; genetic canalisation refers to distinct genotypes producing the same phenotype, while environmental canalisation refers to the same genotype producing the same phenotype in spite of environmental variation.

渠道化分为遗传渠道化和环境渠道化。遗传渠道化是指不同的基因型产生相同的表型；而环境渠道化是指不论环境变异，同一基因型产生相同的表型。

The results showed that NaN3 had great effects on TCL growth. Some TCL after treatment got white or browning and died and grew slowly, and the number of regenerated plantlets was reduced, and the regenerated plantlets became abnormal with leaves crimpled and thicker. The RAPD reaction with 10 primers indicated that the molecule maps of RAPD had some polymorphisms which meant the sequence of DNA was changed.

结果表明，NaN3对类原球茎薄切片生长产生重要影响，部分薄切片白化或褐化死亡，再生类原球茎生长受到抑制，再生苗数量减少，部分再生苗畸变，叶片皱缩、变厚。10条RAPD引物的PCR检测发现，再生苗DNA序列发生了一定程度的变异，产生RAPD图谱带型多态性。

Individuals with gene variants or haplotypes associated with low levels of dopamine beta-hydroxylase were more likely to attain cocaine-free urine with disulfiram in a study of heavy users of cocaine.

试验中投予disulfiram的严重古柯碱成瘾患者，如因个体基因变异或基因序列单体变异使体内产生较低的多巴胺贝他水解酵素，较容易得到没有古柯碱的尿液。

For the isolated Uracil, the shift of the appropriate hydrogen atoms can generate many different tautomers. Moreover, theoretical studies demonstrate that some tautomers of Uracil possibly result in the mispair of nucleic acid base pairs.

通过氢原子的转移，脲嘧啶可以产生许多互变异构体，而且研究表明它的一些互变异构形式可能会导致碱基的错配。

Different variation of 6 agronomic traits were observed in the progenies of different transgenic rice plants.

产生这些变异的主要原因是组织培养过程中发生了体细胞无性系变异，导入外源基因并没有直接影响农艺性状的表达。

With Death guitarist Schuldiner adopting vocal duties, the band made a major impact on the scene.

随着死亡的吉他手Schuldiner接受主唱的职务，乐队在现实中树立了重要的影响。

But he could still end up breakfasting on Swiss-government issue muesli because all six are accused of nicking around 45 million pounds they should have paid to FIFA.

不过他最后仍有可能沦为瑞士政府&议事餐桌&上的一道早餐，因为这所有六个人都被指控把本应支付给国际足联的大约4500万英镑骗了个精光。