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日期:2020-08-04 12:44:38

1. 记者计算发现,原本仅需30元的路程,加价到了80元。
2.   "Traitress!" cried the genius, "is not this man your lover?"
3.   From these several reasons, namely, the improbability of man having formerly got seven or eight supposed species of pigeons to breed freely under domestication; these supposed species being quite unknown in a wild state, and their becoming nowhere feral; these species having very abnormal characters in certain respects, as compared with all other Columbidae, though so like in most other respects to the rock-pigeon; the blue colour and various marks occasionally appearing in all the breeds, both when kept pure and when crossed; the mongrel offspring being perfectly fertile; from these several reasons, taken together, I can feel no doubt that all our domestic breeds have descended from the Columba livia with its geographical sub-species.
4. 怎么办?一次又一次,以至于真正麻木?就像美国枪击案,每次大规模枪击案后,全社会群情激奋,各种悲伤悼念,然后,就没有然后了,控枪都是空谈,都是政治斗争筹码,大家眼睁睁地等着新的悲剧在身边发生。
5. Agents and investment institutions are now flooding the sector, causing additional changes to the platforms in the world's second-largest economy, the report said.
6. adj. 传统的


1. 宋女士告诉北青报记者,这并不是程普第一次离家。
2. 6.楔子的尖端
3.   Correlation of Growth
4. 记得第一次走进学习的企业是OneAPM,我想把这个活动做成一个长期的活动,觉得应该要给这个活动起个名字。
5. 这边唱着新的故事,那边瑞幸就计划增发1200万股美国存托股(ADS),以及将发行4亿美元的可转换优先债券。
6. 王女士想让该典藏公司鉴宝、估价、并卖个好价钱,但又担心这个典藏公司的专家不识货。


1. 外媒:苹果iPhone发布13周年,累计销量接近20亿部据外媒报道,13年前的1月9日,苹果公司发布了第一代iPhone手机。
2.   'I take a degree!' cried Steerforth. 'Not I! my dear Daisy - will you mind my calling you Daisy?'
3.   "Well, now, let us turn to this unfortunate German master. The boywas fully dressed when he fled. Therefore, he foresaw what he woulddo. But the German went without his socks. He certainly acted onvery short notice."
4. 十元就在《亲密姐妹》演过陪酒女孩▽女顾客也可以支付相应费用,带牛郎出街,所以经常可以在大城市的大街上看到浓妆艳抹的老妇身边跟着一个很时尚的小男生。
5. ①要想做到不可预测,投手必须随机选择一系列精确的投球。他不能投出不精确的球。一个不精确的投手当然不可预测,因为他自己都不晓得球会飞向何处。若是缺少精确性,投手就没办法决定什么时候应该投什么类型的球,以及不同类型的球应该保持怎样的相对频率。精确而不可预测的投球的一个绝妙例子是不旋转球。由于这种球几乎不会旋转,球面上的缝合线会在空中飞行过程中引发相当突然的路线变化,结果没有人可以很有把握地预测它的落点。不过,话又说回来,没有几个投手可以投出好的不旋转球。
6. 即便可以随时回公司,但员工回去一趟路上也会增加感染的风险,我们也不希望任何一个人出现问题,一位游戏研发负责人表示。


1. Will the rest of the world cooperate?
2.   "I have a favour to ask of your Majesty, and I beg you to believe that it is in no way prompted by my husband. It is that you will allow us both to visit my father-in-law King Schahzaman."
3. 中国传媒大学公布的《2019中国音乐人生存状况报告》显示,2019年仍有近半数音乐人的月收入依然在2000元以下,而月收入达到1万元以上的只有9.3%,现在的绝大多数音乐人依旧难靠音乐变现。
4.   This, Commander of the Faithful, is my story, and may I venture to hope that, now you have heard the reason of my conduct, your Highness will not think this wicked woman too harshly treated?
5. "There is such a yellow gentleman next door, Sara," Lottie whispered at the French class afterward. "Do you think he is a Chinee? The geography says the Chinee men are yellow."
6. 第二天,她悄悄去医院检查,确诊已被新型冠状病毒感染,随后入院。


1. 在陈某某被观察的情况下,陈某也意识到防疫工作的重要性。
2. 其后,他为《罗马假日》中的格里高列·派克和《阴谋的代价》中的保罗·贝尔蒙多配音,分获文化部优秀译制片奖(华表奖前身)。
3.   But I must here remark that I do not suppose that the process ever goes on so regularly as is represented in the diagram, though in itself made somewhat irregular. I am far from thinking that the most divergent varieties will invariably prevail and multiply: a medium form may often long endure, and may or may not produce more than one modified descendant; for natural selection will always act according to the nature of the places which are either unoccupied or not perfectly occupied by other beings; and this will depend on infinitely complex relations. But as a general rule, the more diversified in structure the descendants from any one species can be rendered, the more places they will be enabled to seize on, and the more their modified progeny will be increased. In our diagram the line of succession is broken at regular intervals by small numbered letters marking the successive forms which have become sufficiently distinct to be recorded as varieties. But these breaks are imaginary, and might have been inserted anywhere, after intervals long enough to have allowed the accumulation of a considerable amount of divergent variation.As all the modified descendants from a common and widely-diffused species, belonging to a large genus, will tend to partake of the same advantages which made their parent successful in life, they will generally go on multiplying in number as well as diverging in character: this is represented in the diagram by the several divergent branches proceeding from (A). The modified offspring from the later and more highly improved branches in the lines of descent, will, it is probable, often take the place of, and so destroy, the earlier and less improved branches: this is represented in the diagram by some of the lower branches not reaching to the upper horizontal lines. In some cases I do not doubt that the process of modification will be confined to a single line of descent, and the number of the descendants will not be increased; although the amount of divergent modification may have been increased in the successive generations. This case would be represented in the diagram, if all the lines proceeding from (A) were removed, excepting that from a1 to a10 In the same way, for instance, the English race-horse and English pointer have apparently both gone on slowly diverging in character from their original stocks, without either having given off any fresh branches or races.After ten thousand generations, species (A) is supposed to have produced three forms, a10, f10, and m10, which, from having diverged in character during the successive generations, will have come to differ largely, but perhaps unequally, from each other and from their common parent. If we suppose the amount of change between each horizontal line in our diagram to be excessively small, these three forms may still be only well-marked varieties; or they may have arrived at the doubtful category of sub-species; but we have only to suppose the steps in the process of modification to be more numerous or greater in amount, to convert these three forms into well-defined species: thus the diagram illustrates the steps by which the small differences distinguishing varieties are increased into the larger differences distinguishing species. By continuing the same process for a greater number of generations (as shown in the diagram in a condensed and simplified manner), we get eight species, marked by the letters between a14 and m14, all descended from (A). Thus, as I believe, species are multiplied and genera are formed.In a large genus it is probable that more than one species would vary. In the diagram I have assumed that a second species (I) has produced, by analogous steps, after ten thousand generations, either two well-marked varieties (w10 and z10) or two species, according to the amount of change supposed to be represented between the horizontal lines. After fourteen thousand generations, six new species, marked by the letters n14 to z14, are supposed to have been produced. In each genus, the species, which are already extremely different in character, will generally tend to produce the greatest number of modified descendants; for these will have the best chance of filling new and widely different places in the polity of nature: hence in the diagram I have chosen the extreme species (A), and the nearly extreme species (I), as those which have largely varied, and have given rise to new varieties and species. The other nine species (marked by capital letters) of our original genus, may for a long period continue transmitting unaltered descendants; and this is shown in the diagram by the dotted lines not prolonged far upwards from want of space.But during the process of modification, represented in the diagram, another of our principles, namely that of extinction, will have played an important part. As in each fully stocked country natural selection necessarily acts by the selected form having some advantage in the struggle for life over other forms, there will be a constant tendency in the improved descendants of any one species to supplant and exterminate in each stage of descent their predecessors and their original parent. For it should be remembered that the competition will generally be most severe between those forms which are most nearly related to each other in habits, constitution, and structure. Hence all the intermediate forms between the earlier and later states, that is between the less and more improved state of a species, as well as the original parent-species itself, will generally tend to become extinct. So it probably will be with many whole collateral lines of descent, which will be conquered by later and improved lines of descent. If, however, the modified offspring of a species get into some distinct country, or become quickly adapted to some quite new station, in which child and parent do not come into competition, both may continue to exist.If then our diagram be assumed to represent a considerable amount of modification, species (A) and all the earlier varieties will have become extinct, having been replaced by eight new species (a14 to m14); and (I) will have been replaced by six (n14 to z14) new species.

网友评论(42135 / 69799 )

  • 1:刘景地 2020-08-03 12:44:39


  • 2:王逢渡 2020-07-15 12:44:39


  • 3:泰民娜恩 2020-07-23 12:44:39


  • 4:卫技 2020-07-19 12:44:39

      In regard to plants, there is another means of observing the accumulated effects of selection namely, by comparing the diversity of flowers in the different varieties of the same species in the flower-garden; the diversity of leaves, pods, or tubers, or whatever part is valued, in the kitchen-garden, in comparison with the flowers of the same varieties; and the diversity of fruit of the same species in the orchard, in comparison with the leaves and flowers of the same set of varieties. See how different the leaves of the cabbage are, and how extremely alike the flowers; how unlike the flowers of the heartsease are, and how alike the leaves; how much the fruit of the different kinds of gooseberries differ in size, colour, shape, and hairiness, and yet the flowers present very slight differences. It is not that the varieties which differ largely in some one point do not differ at all in other points; this is hardly ever, perhaps never, the case. The laws of correlation of growth, the importance of which should never be overlooked, will ensure some differences; but, as a general rule, I cannot doubt that the continued selection of slight variations, either in the leaves, the flowers, or the fruit, will produce races differing from each other chiefly in these characters.It may be objected that the principle of selection has been reduced to methodical practice for scarcely more than three-quarters of a century; it has certainly been more attended to of late years, and many treatises have been published on the subject; and the result, I may add, has been, in a corresponding degree, rapid and important. But it is very far from true that the principle is a modern discovery. I could give several references to the full acknowledgement of the importance of the principle in works of high antiquity. In rude and barbarous periods of English history choice animals were often imported, and laws were passed to prevent their exportation: the destruction of horses under a certain size was ordered, and this may be compared to the 'roguing' of plants by nurserymen. The principle of selection I find distinctly given in an ancient Chinese encyclopaedia. Explicit rules are laid down by some of the Roman classical writers. From passages in Genesis, it is clear that the colour of domestic animals was at that early period attended to. Savages now sometimes cross their dogs with wild canine animals, to improve the breed, and they formerly did so, as is attested by passages in Pliny. The savages in South Africa match their draught cattle by colour, as do some of the Esquimaux their teams of dogs. Livingstone shows how much good domestic breeds are valued by the negroes of the interior of Africa who have not associated with Europeans. Some of these facts do not show actual selection, but they show that the breeding of domestic animals was carefully attended to in ancient times, and is now attended to by the lowest savages. It would, indeed, have been a strange fact, had attention not been paid to breeding, for the inheritance of good and bad qualities is so obvious.At the present time, eminent breeders try by methodical selection, with a distinct object in view, to make a new strain or sub-breed, superior to anything existing in the country. But, for our purpose, a kind of Selection, which may be called Unconscious, and which results from every one trying to possess and breed from the best individual animals, is more important. Thus, a man who intends keeping pointers naturally tries to get as good dogs as he can, and afterwards breeds from his own best dogs, but he has no wish or expectation of permanently altering the breed. Nevertheless I cannot doubt that this process, continued during centuries, would improve and modify any breed, in the same way as Bakewell, Collins, &c., by this very same process, only carried on more methodically, did greatly modify, even during their own lifetimes, the forms and qualities of their cattle. Slow and insensible changes of this kind could never be recognised unless actual measurements or careful drawings of the breeds in question had been made long ago, which might serve for comparison. In some cases, however, unchanged or but little changed individuals of the same breed may be found in less civilised districts, where the breed has been less improved. There is reason to believe that King Charles's spaniel has been unconsciously modified to a large extent since the time of that monarch. Some highly competent authorities are convinced that the setter is directly derived from the spaniel, and has probably been slowly altered from it. It is known that the English pointer has been greatly changed within the last century, and in this case the change has, it is believed, been chiefly effected by crosses with the fox-hound; but what concerns us is, that the change has been effected unconsciously and gradually, and yet so effectually, that, though the old Spanish pointer certainly came from Spain, Mr Barrow has not seen, as I am informed by him, any native dog in Spain like our pointer.By a similar process of selection, and by careful training, the whole body of English racehorses have come to surpass in fleetness and size the parent Arab stock, so that the latter, by the regulations for the Goodwood Races, are favoured in the weights they carry. Lord Spencer and others have shown how the cattle of England have increased in weight and in early maturity, compared with the stock formerly kept in this country. By comparing the accounts given in old pigeon treatises of carriers and tumblers with these breeds as now existing in Britain, India, and Persia, we can, I think, clearly trace the stages through which they have insensibly passed, and come to differ so greatly from the rock-pigeon.

  • 5:武丰河 2020-07-17 12:44:39

      "Who is he?"

  • 6:陆文杰 2020-07-19 12:44:39


  • 7:吉扎西 2020-07-24 12:44:39

  • 8:郭百惠 2020-07-17 12:44:39

      (A knock.)

  • 9:梅博纳 2020-07-27 12:44:39


  • 10:阿克顿 2020-07-27 12:44:39

      `Well, well,' said the old clerk; `we all have our various ways of gaining a livelihood. Some of us have damp ways, and some of us have dry ways. Here is the letter. Go along.'