有生物的

During the postgenomics era the information about genomic sequence and gene functions provides a new foundation for evolutionary biology and ecology As the first whole-genome sequenced plant Arabidopsis thaliana and its wild relatives have played a critical role in understanding the evolution of genomics and speciation Both A halleri and A lyrata are closely related to the model species A thaliana A halleri ssp gemmifera occurs in northeastern China Japan and Taiwan; while its sister A halleri ssp halleri is mainly distributed in Europe Geographical barriers such as Tienshan Mountain Range isolate these intraspecific sisters Likewise A lyrata ssp kamchatica and ssp lyrata occur in East Asia and North America respectively Such distribution patterns seem to be consistent with allopartic speciation The comparison between ancestral and extant polymorphism by multilocus can be informative about the population genetics of speciation In this study we collected and analyzed DNA sequences of 98 genes from four wild relatives of A thaliana A halleri ssp gemmifera A halleri ssp halleri A lyrata ssp kamchatica and A lyrata ssp lyrata The ancestral states of these four species were compared to each other in terms of level of genetic variation However the ancestral species at the time of speciation were substantially more polymorphic than the extant geographical populations The observations are not fully compatible with speciation by strict allopatry At some species pairs parapatric speciation seems more reasonable in speciation of Arabidopsis The 98 gene sequences are also used for the congruence test between gene genealogy and species phylogeny Only 28 genes support the species phylogeny but there are 23 genes supports another major genealogy { lyrata} thaliana Based on the phylogenetic position change of A lyrata ssp kamchatica and Ks value for each species pair suggested the recent directional gene flow between A halleri ssp gemmifera and A lyrata ssp kamchatica

阿拉伯芥是第一个完成基因体定序的开花植物，其基因体资讯提供植物学研究的重要依据；在解析阿拉伯芥属物种的亲缘关系以及种化机制等重要的演化议题时，阿拉伯芥近缘的野生物种自然成了不可或缺的关键；跟阿拉伯芥近缘的物种包括A halleri及A lyrata，其中A halleri ssp gemmifera主要分布於中国东北、日本以及台湾，与近缘的A halleri ssp halleri其分布於欧洲隔著天山及大陆的障蔽，而A lyrata ssp kamchatica主要分布於东北亚及台湾，与分布於北美五大湖的A lyrata ssp lyrata被北极圈所分隔，这样的分布模式暗示异域种化的可能。藉由多基因分析比较祖先物种与现生物种遗传歧异度的相关可提供讯息探讨种化时期的族群遗传结构，本研究针对A halleri ssp gemmifera、A halleri ssp halleri及A lyrata ssp kamchatica、A lyrata ssp lyrata四个物种，两对互为亚种的姊妹群，以阿拉伯芥为外群进行研究，在四个物种完成98个同源基因的分子序列，利用套装软体MCMCcoal来估算祖先物种的遗传变异，亦估算现生物种的核苷酸歧异度，观察到？多物种配对中祖先物种遗传多型性大於现生物种DNA歧异度，显示异域种化模型并无法完全解释阿拉伯芥属物种的种化模式，在某些物种配对间邻域种化模式应比异域种化更为可能；在基因树与物种树的比较，98个基因片段的亲缘模式只有28个是与已知物种树一致的，有23个基因其树状图支持{ lyrata} thaliana的型式，藉由kamchatica位置的变化以及估算各物种配对间的平均同义置换率，推测在A halleri ssp gemmifera与A lyrata ssp kamchatica间具有近代的单方向基因交流。

One day, a big fish finally took the bait. The fish dragged the rope, diving down to the bottom of the sea and then, jumping up to the sky. Wave made by the fish was as high as hill as if the whole East Sea was stirred. King of dragon was astonished when saw the stirring. The creatures around a thousand kilometer were panic-stricken.

有一天，终於有条大鱼上钩了，鱼儿牵动鱼绳，时而深入海底、时而跳到天际；鱼儿翻滚时所激起的白浪有山那麼高，整个东海似乎都沸腾了起来，就连海龙王看到这样的情形也啧啧称奇，至於千里之内的生物都吓得四处惊慌逃窜。

Thus he shut himself up, he lived there, he was absolutely satisfied with it, leaving on one side the prodigious questions which attract and terrify, the fathomless perspectives of abstraction, the precipices of metaphysics--all those profundities which converge, for the apostle in God, for the atheist in nothingness; destiny, good and evil, the way of being against being, the conscience of man, the thoughtful somnambulism of the animal, the transformation in death, the recapitulation of existences which the tomb contains, the incomprehensible grafting of successive loves on the persistent _I_, the essence, the substance, the Nile, and the Ens, the soul, nature, liberty, necessity; perpendicular problems, sinister obscurities, where lean the gigantic archangels of the human mind; formidable abysses, which Lucretius, Manou, Saint Paul, Dante, contemplate with eyes flashing lightning, which seems by its steady gaze on the infinite to cause stars to blaze forth there.

他自己便隐藏在那里，生活在那里，绝对心满意足，不理睬那些诱人而又骇人的重大问题，如抽象理论的无可揣摹的远景以及形而上学的探渊，所有那些针对同一问题的玄妙理论他都抛在一边，留给上帝的信徒和否定上帝的虚无论者去处理，这些玄论有命运、善恶、生物和生物间的斗争、动物的半睡眠半思想状态、死后的转化、坟墓中的生命总结、宿世的恩情对今生的"我"的那种不可理解的纠缠、元精、实质、色空、灵魂、本性、自由、必然，还有代表人类智慧的巨神们所探索的那些穷高极深的问题，还有卢克莱修①、摩奴②、圣保罗和但丁曾以炬火似的目光，凝神仰望那仿佛能使群星跃出的浩阔天空。

Its vivid characteristics is that it has abundant educational content, various educational approach, osmotic educational method, acceptive educatee and dependent educational effect .

中学生物学科德育功能的特点很鲜明，有教育内容丰富、教育途径多样、教育方法渗透化、教育对象易接受以及育人效果有一定依赖性等特点。

In this study, Dr. Anderson and colleagues analyzed prediagnostic serum samples and patient data from the Carotene and Retinol Efficacy Trial, a randomized chemoprevention trial that evaluated the effects of beta-carotene and retinol on the incidence of lung cancer among individuals at high risk for the disease.

参与Fred Hutchinson癌症研究中心公共健康科学小组的Anderson医师表示，我不知道目前是否有其他生物标记比这些更有效，但是在过去几年间，有许多关於找到可能标记的尝试，不过，并不是每个都有充分研究。

There was a great deal of choice of creatures and designs, and they all looked attractive and i m pressive.

有一对生物和设计的选择很多，他们都期望有吸引力和令人印象深刻。

Most of water-soluble cyanine dyes have -SO3H and –COOH in their molecules, which will influence the biomolecules' functional characters. A new kind of water-soluble cyanine dyes with several cations in molecules were designed and synthesized, preparation conditions of intermediate and dyes were researched and optimized, the yield of dye is 25%. The novel kind of cyanine dye are water-soluble , spectrum characters was researched , all the dyes were charactered by 1H NMR and TOF-MS, spectrum in different solvent of novel dyes were focused on, one of the kind dyes show higher fluorescence quantum yield than the result reported. Because of several cations in the structure, it is promising when used in DNA assay and other bio-assay field.

大多数水溶性的菁类荧光染料分子结构中都带有-SO3H和-COOH等基团，过多的阴离子的引入容易造成对生物分子的功能属性的影响，本论文设计并合成了分子结构中带有多个正电荷的水溶性的一类新型菁染料，考察并且研究了中间体和染料的合成条件，最终的目标产物产率达到25％，染料通过了质谱和核磁的表征，新型的染料具有良好的水溶性，研究了新染料在多种溶剂的的光谱性质，其中一种染料的在水中的荧光量子产率比文献报道得到了提高，由于富集了正电荷，这类菁染料在DNA标记等生物中有一定应用前景。

He suggested the following figures should be multiplied: how many stars are formed in the galaxy in a year; what fraction of these have planets and thus form solar systems; the average number of planets per solar system that have the potential to support life; on what percentage of those where it is possible do such biospheres actually form; what percentage of such biospheres give rise to intelligent species; what percentage of intelligent life is able to transmit signals into space; and for how long could such intelligence keeps sending signals.

他的方法包括一系列应该纳入考虑范围的数据：银河系每年新诞生的恒星数；拥有行星并组成了星系的恒星比率；有可能会出现生命迹象的行星平均数；以上行星能够真正孕育生命的比率；演化出了智能物种的比率；能使用无线电通讯与外太空联系的智能生物比率；智能生物使用无线电通讯方式的持续时间。更多信息请访问： http：//www.24en.com

He suggested the following figures should be multiplied: how many stars are formed in the galaxy in a year; what fraction of these have planets and thus form solar systems; the average number of planets per solar system that have the potential to support life; on what percentage of those where it is possible do such biospheres actually form; what percentage of such biospheres give rise to intelligent species; what percentage of intelligent life is able to transmit signals into space; and for how long could such intelligence keeps sending signals.

他的方法包括一系列应该纳入考虑范围的数据：银河系每年新诞生的恒星数；拥有行星并组成了星系的恒星比率；有可能会出现生命迹象的行星平均数；以上行星能够真正孕育生命的比率；演化出了智能物种的比率；能使用无线电通讯与外太空联系的智能生物比率；智能生物使用无线电通讯方式的持续时间。

Although female hormone has abundant breast effect, but also have side effect; The active ingredient that the plant extracts has the root of red-rooted salvia, safflower, yuan introduced from the northern and western nationalities or from abroad, the root of herbaceous peony, the root-tuber of aromatic turmeric; Develop at full speed in biology technology today, the biochemical preparation such as acid of collagen albumen, fruit, Dna, algal polysaccharide also begins to apply in beautiful breast product.

雌性激素虽有丰乳效果，但也有副作用；植物提取的有效成分有丹参、红花、元胡、赤芍、郁金等；在生物技术飞速发展的今天，胶原蛋白、果酸、dna、海藻多糖等生化制剂也开始应用于美乳产品中。

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。