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日期:2020-08-07 12:50:32

1.   `I received a letter from the Bank, sir, yesterday, informing me that some intelligence--or discovery---
2. 他说:爱祖国不是抽象的,作为一名教师,首先就是要爱学校、爱学生。
3. 这就知道有人来救了,他们敲13下,我们就回13下。
4. "They are kept shut up, or chained." She paused again, and asked, "Is not a dog fond of running? Are they not built for speed?" That we admitted, too, and Jeff, still malicious, enlightened them further.
5. 000000000000000112内J4哎」
6.   When we see any part or organ developed in a remarkable degree or manner in any species, the fair presumption is that it is of high importance to that species; nevertheless the part in this case is eminently liable to variation. Why should this be so? On the view that each species has been independently created, with all its parts as we now see them, I can see no explanation. But on the view that groups of species have descended from other species, and have been modified through natural selection, I think we can obtain some light. In our domestic animals, if any part, or the whole animal, be neglected and no selection be applied, that part (for instance, the comb in the Dorking fowl) or the whole breed will cease to have a nearly uniform character. The breed will then be said to have degenerated. In rudimentary organs, and in those which have been but little specialized for any particular purpose, and perhaps in polymorphic groups, we see a nearly parallel natural case; for in such cases natural selection either has not or cannot come into full play, and thus the organisation is left in a fluctuating condition. But what here more especially concerns us is, that in our domestic animals those points, which at the present time are undergoing rapid change by continued selection, are also eminently liable to variation. Look at the breeds of the pigeon; see what a prodigious amount of difference there is in the beak of the different tumblers, in the beak and wattle of the different carriers, in the carriage and tail of our fantails, &c., these being the points now mainly attended to by English fanciers. Even in the sub-breeds, as in the short-faced tumbler, it is notoriously difficult to breed them nearly to perfection, and frequently individuals are born which depart widely from the standard. There may be truly said to be a constant struggle going on between, on the one hand, the tendency to reversion to a less modified state, as well as an innate tendency to further variability of all kinds, and, on the other hand, the power of steady selection to keep the breed true. In the long run selection gains the day, and we do not expect to fail so far as to breed a bird as coarse as a common tumbler from a good short-faced strain. But as long as selection is rapidly going on, there may always be expected to be much variability in the structure undergoing modification. It further deserves notice that these variable characters, produced by man's selection, sometimes become attached, from causes quite unknown to us, more to one sex than to the other, generally to the male sex, as with the wattle of carriers and the enlarged crop of pouters.Now let us turn to nature. When a part has been developed in an extraordinary manner in any one species, compared with the other species of the same genus, we may conclude that this part has undergone an extraordinary amount of modification, since the period when the species branched off from the common progenitor of the genus. This period will seldom be remote in any extreme degree, as species very rarely endure for more than one geological period. An extraordinary amount of modification implies an unusually large and long-continued amount of variability, which has continually been accumulated by natural selection for the benefit of the species. But as the variability of the extraordinarily-developed part or organ has been so great and long-continued within a period not excessively remote, we might, as a general rule, expect still to find more variability in such parts than in other parts of the organisation, which have remained for a much longer period nearly constant. And this, I am convinced, is the case. That the struggle between natural selection on the one hand, and the tendency to reversion and variability on the other hand, will in the course of time cease; and that the most abnormally developed organs may be made constant, I can see no reason to doubt. Hence when an organ, however abnormal it may be, has been transmitted in approximately the same condition to many modified descendants, as in the case of the wing of the bat, it must have existed, according to my theory, for an immense period in nearly the same state; and thus it comes to be no more variable than any other structure. It is only in those cases in which the modification has been comparatively recent and extraordinarily great that we ought to find the generative variability, as it may be called, still present in a high degree. For in this case the variability will seldom as yet have been fixed by the continued selection of the individuals varying in the required manner and degree, and by the continued rejection of those tending to revert to a former and less modified condition.The principle included in these remarks may be extended. It is notorious that specific characters are more variable than generic. To explain by a simple example what is meant. If some species in a large genus of plants had blue flowers and some had red, the colour would be only a specific character, and no one would be surprised at one of the blue species varying into red, or conversely; but if all the species had blue flowers, the colour would become a generic character, and its variation would be a more unusual circumstance. I have chosen this example because an explanation is not in this case applicable, which most naturalists would advance, namely, that specific characters are more variable than generic, because they are taken from parts of less physiological importance than those commonly used for classing genera. I believe this explanation is partly, yet only indirectly, true; I shall, however, have to return to this subject in our chapter on Classification. It would be almost superfluous to adduce evidence in support of the above statement, that specific characters are more variable than generic; but I have repeatedly noticed in works on natural history, that when an author has remarked with surprise that some important organ or part, which is generally very constant throughout large groups of species, has differed considerably in closely-allied species, that it has, also, been variable in the individuals of some of the species. And this fact shows that a character, which is generally of generic value, when it sinks in value and becomes only of specific value, often becomes variable, though its physiological importance may remain the same. Something of the same kind applies to monstrosities: at least Is. Geoffroy St. Hilaire seems to entertain no doubt, that the more an organ normally differs in the different species of the same group, the more subject it is to individual anomalies.On the ordinary view of each species having been independently created, why should that part of the structure, which differs from the same part in other independently-created species of the same genus, be more variable than those parts which are closely alike in the several species? I do not see that any explanation can be given. But on the view of species being only strongly marked and fixed varieties, we might surely expect to find them still often continuing to vary in those parts of their structure which have varied within a moderately recent period, and which have thus come to differ. Or to state the case in another manner: the points in which all the species of a genus resemble each other, and in which they differ from the species of some other genus, are called generic characters; and these characters in common I attribute to inheritance from a common progenitor, for it can rarely have happened that natural selection will have modified several species, fitted to more or less widely-different habits, in exactly the same manner: and as these so-called generic characters have been inherited from a remote period, since that period when the species first branched off from their common progenitor, and subsequently have not varied or come to differ in any degree, or only in a slight degree, it is not probable that they should vary at the present day. On the other hand, the points in which species differ from other species of the same genus, are called specific characters; and as these specific characters have varied and come to differ within the period of the branching off of the species from a common progenitor, it is probable that they should still often be in some degree variable, at least more variable than those parts of the organisation which have for a very long period remained constant.In connexion with the present subject, I will make only two other remarks. I think it will be admitted, without my entering on details, that secondary sexual characters are very variable; I think it also will be admitted that species of the same group differ from each other more widely in their secondary sexual characters, than in other parts of their organisation; compare, for instance, the amount of difference between the males of gallinaceous birds, in which secondary sexual characters are strongly displayed, with the amount of difference between their females; and the truth of this proposition will be granted. The cause of the original variability of secondary sexual characters is not manifest; but we can see why these characters should not have been rendered as constant and uniform as other parts of the organisation; for secondary sexual characters have been accumulated by sexual selection, which is less rigid in its action than ordinary selection, as it does not entail death, but only gives fewer offspring to the less favoured males. Whatever the cause may be of the variability of secondary sexual characters, as they are highly variable, sexual selection will have had a wide scope for action, and may thus readily have succeeded in giving to the species of the same group a greater amount of difference in their sexual characters, than in other parts of their structure.It is a remarkable fact, that the secondary sexual differences between the two sexes of the same species are generally displayed in the very same parts of the organisation in which the different species of the same genus differ from each other. Of this fact I will give in illustration two instances, the first which happen to stand on my list; and as the differences in these cases are of a very unusual nature, the relation can hardly be accidental. The same number of joints in the tarsi is a character generally common to very large groups of beetles, but in the Engidae, as Westwood has remarked, the number varies greatly; and the number likewise differs in the two sexes of the same species: again in fossorial hymenoptera, the manner of neuration of the wings is a character of the highest importance, because common to large groups; but in certain genera the neuration differs in the different species, and likewise in the two sexes of the same species. This relation has a clear meaning on my view of the subject: I look at all the species of the same genus as having as certainly descended from the same progenitor, as have the two sexes of any one of the species. Consequently, whatever part of the structure of the common progenitor, or of its early descendants, became variable; variations of this part would it is highly probable, be taken advantage of by natural and sexual selection, in order to fit the several species to their several places in the economy of nature, and likewise to fit the two sexes of the same species to each other, or to fit the males and females to different habits of life, or the males to struggle with other males for the possession of the females.Finally, then, I conclude that the greater variability of specific characters, or those which distinguish species from species, than of generic characters, or those which the species possess in common; that the frequent extreme variability of any part which is developed in a species in an extraordinary manner in comparison with the same part in its congeners; and the not great degree of variability in a part, however extraordinarily it may be developed, if it be common to a whole group of species; that the great variability of secondary sexual characters, and the great amount of difference in these same characters between closely allied species; that secondary sexual and ordinary specific differences are generally displayed in the same parts of the organisation, are all principles closely connected together. All being mainly due to the species of the same group having descended from a common progenitor, from whom they have inherited much in common, to parts which have recently and largely varied being more likely still to go on varying than parts which have long been inherited and have not varied, to natural selection having more or less completely, according to the lapse of time, overmastered the tendency to reversion and to further variability, to sexual selection being less rigid than ordinary selection, and to variations in the same parts having been accumulated by natural and sexual selection, and thus adapted for secondary sexual, and for ordinary specific purposes.Distinct species present analogous variations; and a variety of one species often assumes some of the characters of an allied species, or reverts to some of the characters of an early progenitor.


1. 她说自己从来没有这么想开学,想结束寒假,想当一个对社会有用的人。
2. 被告人詹某波犯虚开增值税专用发票罪、虚开发票罪,判处有期徒刑八年六个月,并处罚金人民币四十六万元。
3.   Mme. Bonacieux kissed the hands of the queen, concealed the paperin the bosom of her dress, and disappeared with the lightness ofa bird.
4. Miss Minchin became quite white with rage.
5. 据大麦网武汉站官方微信1月22日晚间消息:为响应国家关于疫情管理的要求,保障观众的健康和安全,摩登兄弟武汉站、韩红武汉站、蔡依林武汉站、李宗盛黄石站演出暂缓,将延期举行。
6. "I do like you," Sara answered. "I thought--you see, everything is different now. I thought you--were different.


1. 第五,谦恭诚恳朴实无华的播报,并且要与广大受众产生感同身受的共鸣。
2.   Gradually she began to think it was because it was summer.Nothing was going on much save such entertainments as the one inwhich she was the star. Fifth Avenue was boarded up where therich had deserted their mansions. Madison Avenue was littlebetter. Broadway was full of loafing thespians in search of nextseason's engagements. The whole city was quiet and her nightswere taken up with her work. Hence the feeling that there waslittle to do.
3. 还有网友说感觉体育老师都被养胖了最后,网友还为体育老师打抱不平↓↓↓体育老师一节课都没上凭什么学不好就赖体育老师教的每次学习不好会被说你这是体育老师教的的吧体育老师背了这么多年的锅也该卸下来了。
4. 一般来说,中间路线的自由派民主主义者更忠于世俗主义对真相和同情的追求,但就连他们,有时也会先放下这些追求,去拥抱能够提供安慰的教条。因此,一旦面对残酷独裁统治的混乱,甚至许多国家面临失败,自由主义者常常就会展现出绝对的信仰,相信“普选”这个神奇的仪式能扭转乾坤。他们在伊拉克、阿富汗和刚果等地参加战斗,投入数十亿美元,坚信只要能够举行普选,就能让这些地方如同丹麦一样拥有更灿烂的阳光。尽管这种做法一再失败,在早有普选传统的地方也偶尔会选出专制平民主义者,但最后的结果与多数的独裁统治相差无几。如果你想质疑普选究竟能否达到所声称的效果,虽然不会被送到劳改营,但各种教条上的霸凌很可能会像一桶冰水浇到你的头上。
5. 在热点效应之下,涉事基金会过于注重筹款额,没有结合受助者本人的实际情况,缺乏一个理性预估的范围,制定出合理的医疗募捐目标,盲目地为筹款额设定了100万的额度。
6. 测试人员会一项一项的打开这些功能的开关,一旦出现了问题,就可以迅速定位对应的功能模块。


1.   Moreover, he knew how to speake, and do such things, as werebeyond wonder or admiration. And, never remembring his olde tatterdFriars Cowle, which was so snottie and greazie, that good store ofkitchin stuffe might have beene boiled out of it; as also a fouleslovenly Trusse or halfe doublet, all baudied with bowsing, fatgreazie lubberly sweating, and other drudgeries in the ConventKitchin, where he was an Officer in the meanest credite. So that todescribe this sweet youth in his lively colours, both for naturallperfections of body, and artificiall composure of his Garments;never came the fowlest silks out of Tartaria or India, more ugly orunsightly to bee lookt upon. And for a further addition to his neateknavery, his breeches were so rent betweene his legges, his shooes andstockings had bin at such a mercilesse massacre: that the gallantestCommandador of Castile (though he had never so lately bin releastout of slavery) could have wisht for better garments, then he; or makelarger promises, then he did to his Nuta. Protesting to entitle her ashis onely, to free her from the Inne and Chamber thraldomes, if shewould live with him, be his Love, partaker of his present possessions,and so to succeed in his future Fortunes. All which bravadoes,though they were belcht foorth with admirable insinuations: yet theyconverted into smoke, as all such braggadochio behaviours do, and hewas as wise at the ending, as when he began.
2. This was the biggest monthly drop in imports since last September and also means shipments have contracted year-on-year for the past 15 months straight.
3. 虽然公司在妇科和泌尿科手术中拥有庞大市佔率,但近期才开始在直肠和胸腔手术建立市佔率,而在一般软组织手术,亦有长远发展机会。
4. “失业”是金融类最热门的搜索项,其次是“华尔街公司”和“产品召回”。
5. 外宾也好,其他人也好,在早已经没有了封建帝王的时代,对于故宫来说,他们都应是一视同仁的游客。
6. (作者:汝晴)产业互联网项目报道:农贸SaaS服务商「菜小秘」完成产品升级,优化档口经营SaaS系统消费项目报道:「卧兔科技」:跨境电商海外红人营销平台医疗融资披露:36氪独家|加速全球呼吸道药物开发,「长风药业」完成E轮6.3亿元股权交易为医学学生匹配临床站点,「ClinicianNexus」完成150万美元种子轮融资教育项目报道:「接力棒儿童体能」:儿童体适能培训「接力棒儿童体能」培训成立于2018年,是一家专注于3~12岁儿童体能培训的教育机构。


1. 把未来人类的希望,寄托于假设未来的科学家能有些现不可知却能拯救地球的发现,这种想法真的理性吗?目前让整个世界正在运转的大部分总统、部长和首席执行官都是非常理性的人,但为什么他们愿意下这样的赌注?或许是因为,他们觉得赌的不会是自己个人的未来。就算情况极度恶化,科学再也无法阻挡洪水侵袭,工程师仍然能够为上层阶级打造出一艘高科技的挪亚方舟,至于其他几十亿人就随波而去吧。对于这种高科技方舟的信念,是对人类未来及整个生态系统的最大威胁之一。如果有人一心相信自己死后能上天堂,就不该把核武器交到这种人手中;同样,要决定全球生态议题时,也不该交给相信这种高科技方舟的人。
2. 说到外汇,我坚信,存在主义式的抉择是浮动汇率体制的必然要求:任何人都不能回避某种形式的外汇投机,不作决策本身也是一种决策——当然,也可以选择购入外汇期权,在这种情况下,投资者将为回避决策的做法付出相当可观的代价。根据这一逻辑,即令宏观经济投资的观念尚未构造完好,我仍不得不做出决策。其结果是可想而知的。有时我对那些愚鲁的同行们也不免心生嫉妒,他们对自己所面对的存在主义式的抉择一无所知:比如说,他们避免了1981-1985年期间我所遭受的那种损失,当时美元汇价一涨再涨。
3. 在农牧业务领域,京东数科已经与吉林精气神、哈尔滨信诚、重庆六九畜牧、四川元宝枫等养殖企业签署订单,以人工智能AI技术,实现了对每一头猪的身份精准识别和跟踪,确保每一头猪都能得到单独进食的饲养条件,并对喂食饲料的营养摄入进行了智能化监控。

网友评论(31939 / 53265 )

  • 1:陈鸿燕 2020-08-06 12:50:33


  • 2:杰夫·昆斯 2020-08-01 12:50:33


  • 3:彭滔 2020-07-25 12:50:33

    源于:sloth(n (对工作)懒惰)slou=slow,ch吃:吃得慢-无精打采的样子

  • 4:沃捷 2020-08-04 12:50:33


  • 5:张文钊 2020-07-28 12:50:33

    So far this year, companies have announced 376 share-repurchase initiatives for a total of $261 billion, according to data from Birinyi Associates. That's nearly 72% higher than 2012, though slightly lower when compared to the same period in 2013, which was a record year for buybacks.

  • 6:克里斯蒂亚诺·罗纳尔多 2020-07-29 12:50:33


  • 7:吕庆华 2020-07-29 12:50:33


  • 8:刘亚洲 2020-08-02 12:50:33

    "I knew she was listening," she said. "Why shouldn't she?"

  • 9:袁祥珍 2020-08-02 12:50:33

      Weary, forwaked* in her orisons, *having been long awake Sleepeth Constance, and Hermegild also. This knight, through Satanas' temptation; All softetly is to the bed y-go,* *gone And cut the throat of Hermegild in two, And laid the bloody knife by Dame Constance, And went his way, there God give him mischance.

  • 10:刘东营 2020-07-28 12:50:33