查询词典 co-twin

It is the first time of using the microsatellite primer-PCR and partial gene of mtDNA COⅠ-Ⅱamplification to analyze genetic diversity of host bio-type and body colour bio-type and to probe out the changing mechanism of body colour on green peach aphid in China.

本论文在国内首次运用微卫星引物PCR 扩增和mtDNA COⅠ-Ⅱ部分序列特异扩增的方法对桃蚜寄主生物型和体色生物型的遗传分化和体色变化机理进行了研究。

Among them multi-types of body colour and special types of hosts are the most universal phenomena. In our experiment, methods of microsatellite primer PCR molecular marker and partial gene sequence analysis of mitochondrial DNA COⅠ-Ⅱwere used to analyze genetic diversity of two body colour bio-types (red bio-type and green bio-type) of green peach aphid from different plants and relationship between green peach aphid and host plants by separately selecting individuals of aphid from rape, Chinese cabbage and tobacco. The main results as follows: 1. Selecting An Ruisheng'method of extracting DNA from small sized insect, using this method can extract DNA well and steadily.

本文采用微卫星引物PCR 分子标记和线粒体COⅠ-Ⅱ部分序列分析的方法，分别选取十字花科植物中的甘蓝和油菜，茄科植物中的烟草，对不同寄主上桃蚜的红色和绿色两种体色生物型的遗传多态性及其与寄主植物的关系进行了研究，取得的主要结果如下： 1、选取安瑞生(2002)小型昆虫DNA 提取方法，能很好且比较稳定的提取桃蚜基因组DNA。

Automobile exhaust emissions of pollutants containing 150-200 different compounds, the main harmful ingredients: no combustion or CH incomplete combustion, NOx, CO, CO2, SO2, H2S and the amount of aldehyde, phenol, peroxide , organic acid and lead, phosphorus formed by gasoline lead, phosphorus pollution.

汽车尾气排放的污染物中含有150～200种不同的化合物，其主要有害成分为：未燃烧或燃烧不完全的CH、NOx、CO、CO2、SO2、H2S以及微量的醛、酚、过氧化物、有机酸和含铅、磷汽油所形成的铅、磷污染等。

The palladium catalyzed double carbonylation of phenyl iodide in SC CO〓 to α-keto amide and amide was an environmentally friendly reaction.

1CO〓压力为1.0MPa时，反应转化率和速率情况最佳，进一步增加CO〓压力时导致反应产物总收率、转化率降低，但却有利于提高酰胺的选择性。

Other excellent publications from 2005 to 2006 include Collins CO-BUILD Dictionaries, Cambridge Learner's Dictionary, Reflets, New Standard Korean, New Concept Japanese, Gruffalo picture books, The Dragon Slayer, New Bookworm Readers, National Geographic Reading Expedition series, Applied Linguistics in Action series etc.

外研社与麦克米伦出版公司共同开发、编写的《新标准小学英语》，已经创造了各种产品累积销售突破1亿册/盘的优异成绩。2005年－06年间出版的其他优秀引进产品包括：柯林斯CO-BUILD系列词典、《剑桥中阶双解词典》，《走遍法国》，《新标准韩国语》，《新概念日语》，咕噜牛系列儿童绘本、屠龙学校系列儿童惊悚故事、新书虫系列读物、国家地理科学探索系列、应用语言学实践系列等。2006年8月，外研社与麦克米伦公司签署了引进《自然》百年科学经典的合约。

Experiments show that:when the concentration of acetone is decreased from 100% to 20%,the absorbance bands at 3538cm-1 and 3441cm-1 of CH3 is redshifted,the absorbance band at 1713cm-1 and 1647cm-1 of CO is redshifted about 19 cm-1 and 21cm-1 respectively.

发现随着丙酮水溶液浓度的减小，丙酮CH3键的对称(3538cm-1)和不对称伸缩振动(3441cm-1)吸收峰位置波数减小方向迁徙，CO伸缩振动吸收(1713cm-1)向波数减小方向移动，丙酮浓度为20％时，迁徒至1691cm-1，减小了约19cm-1；同时1647cm-1处的吸收则迁徙至1626cm-1。

This paper discribes the preliminary investigation on radiolysis behavior of methylhydrazine,?-hydroxylethylhydrazine and acet-hydroximic acid in Co-60 Y field.

对甲基肼、β-羟基乙基肼及乙羟肟酸等在Co-60γ辐照场中的辐解行为进行了初步的定性或定量研究。

The objective of this study was extracting Pine seed oil with supercritical CO〓 extraction technique developed, extracting process was studied deeply and systematically in this paper.

本文采用先进的超临界CO〓萃取技术萃取红松仁油，对萃取过程进行了深入全面的研究。

TEM observation showed that the morphology of γFe〓O〓 nano-crystals was plate-shaped and Co〓O〓 nano-crystals consisted of small spherical particles and nano-wires.

TEM观察显示γ-Fe〓O〓纳米晶为片状结构，Co〓O〓纳米晶则是由晶态的球形小粒子和非晶的线形小粒子两部分组成。

It is the first time to compare the emission of the premixing LPG/diesel dual fuel engine with that of the mixing injection LPG/diesel dual fuel engine. The results state that the NO〓 emission of the premixing dual fuel engine is lower than that of mixing injection dual fuel engine in the whole loads, but the emission of HC and CO is reverse.

研究结果表明：在整个负荷范围内，预混进气双燃料发动机的N0〓排放明显低于混合喷射双燃料发动机；混合喷射双燃料发动机的HC和CO排放较低；在小负荷二者的烟度相差不大，但在大负荷预混进气双燃料发动机的烟度较低。

According to the clear water experiment, aeration performance of the new equipment is good with high total oxygen transfer coefficient and oxygen utilization ratio.

曝气设备的动力效率在叶轮转速为120rpm～150rpm时取得最大值，此时氧利用率和充氧能力也具有较高值。

The environmental stability of that world - including its crushing pressures and icy darkness - means that some of its most famous inhabitants have survived for eons as evolutionary throwbacks, their bodies undergoing little change.

稳定的海底环境─包括能把人压扁的压力和冰冷的黑暗─意谓海底某些最知名的栖居生物已以演化返祖的样态活了万世，形体几无变化。