共查询到20条相似文献，搜索用时 31 毫秒
1.
With great care Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer says: "This is the gem of our collections: the fossil of a bird that lived million years ago!" Then pointing at a tiny mound he explains: "Look this is the claw that is the head. It was in the egg shell ready to hatch ... The species fell into a family of waterside inhabitants."…… 《中国科学院院刊(英文版)》2008,22(1):43-46
With great care, Dr. ZHOU Zhonghe takes out a package wrapped by cotton tissue from a drawer and says： “This is the gem of our collections： the fossil of a bird that lived 125 million years ago!” Then, pointing at a tiny mound, he explains： “Look, this is the claw and that is the head. It was in the egg shell and ready to hatch ... The species fell into a family of waterside inhabitants.” 相似文献
2.
1. Cohesion and Coherence According to Halliday and Hasan (1976: 4), cohesion is relations of meaning that exist within the text and that define it as a text. Cohe- sion occurs where the interpretation of some element in the discourse is dependent on that of another. Grammar and lexis are two means to realize the goal of cohesion. In other words, there are grammatical co- hesion and lexical cohesion. Coherence refers to the relationships, which link the meanings of utterances in a discourse … 相似文献
3.
The literature suggests that protection of knowledge from the threat for opportunism is a primary mover for the choice of entry mode.However,the knowledge construct is oversimplified in the literature on entry mode.The combination of different types of knowledge held by a firm reduces the risk of misappropriation and the threat of opportunism is often unimportant in entry mode decisions.Based on these discussions,a new conceptual knowledgebased model of entry mode choice is devoloped.In this model,the kn... 相似文献
4.
The paper argues that the theory that opens out the nature of subject indexing process is required, if the process consists of a tremor of steps and elements and it is a range of interpretations, too. The paper points out that Peirce' s semiotics is the theory by which we may study and understand the lmture of interpretation in subject indexing pro-cess. In recent years, there is a great interest in semiofcs in library and information science field. The paper discusses some basic issues of semiotics and its use in information science. 相似文献
5.
Fang Xin 《中国科学院院刊(英文版)》2003,17(3)
Reform is a process of insti-tutional changes, in which,at any stage, the character-istics of a given institutional arrange-ment must have its contextual logicand cognate inter-relations of mu-tual causality. Just as Douglass C.North points out: History is alwaysimportant and its importance lies notonly in the fact that we might takesomething valuable from the past,but that the present and future areto link the past via the continuity ofa societys institutional system. Thechoice of today and … 相似文献
6.
《中国科学院院刊(英文版)》2008,22(2):88-89
The regulatory mechanism for neuronal migration in the developing cortex is a major unsolved problem in developmental neurobiology. It is generally accepted that the migration of newborn pyramidal neurons from the ventrieular zone toward upper cortical layers is guided by radial glial fibers in the developing cortex, and that the laminar structure of the cortex isformed through regulated attachment and detachment of migrating neurons with radial glial fibers. However, whether the radial migration of cortical neurons can be guided by a gradient of diffusible factors is unknown, a potential guidance mechanism that has long been overlooked. 相似文献
7.
《中国科学院院刊(英文版)》2016,(3)
正In the main Proboscidean taxon of Elephantiformes,a huge pair of developed top incisors(ivories) has become a distinctive feature.The structure is usually made as a tool for individual foraging and a weapon for males to compete for mating.The Proboscidean taxon without ivories usually and only exists in the primitive taxon that were differentiated before Oligocene,for instance,Deinotherium merely developed a pair of 相似文献
8.
《中国专利与商标》2006,(2)
The trademark having the nature of fraud refers to a word/device constituting a trademark that is confusing e-nough to mislead the average consumers as to the quality, raw material, function, use, weight, quantity, and place of o-rigin of a product. Article 10, paragraph one (7) of the Trademark Law prohibits those having the nature of exaggeration and fraud from being used as trademarks. Evidently, "exaggerating" advertisement is not the only cause of trademark having the nature of fraud. With an analysis of two 相似文献
9.
This paper discusses the INAA results of REE in clays atand near some Permian/Triassic boundaries of South China.It showsthat the REE patterns of boundary clays differ from those of non-boundary clays.One difference is that the boundary clays are moreenriched in LREE,with steeper slope of REE and a smaller Eu nega-tive anomaly than the non-boundary clays.Another difference is that theboundary clays show a small Ce negative anomaly,but no Ce anomalyoccurs in the non-boundary clays.From these REE patterns and some other experimental facts,it isproposed that the P/T boundary clay may be a mixed product consistingof the acidic-intermediate ash and the upper crust substance representingsputtering component,and the calculated fraction of the former andlatter is 7/3. 相似文献
10.
《中国科学院院刊(英文版)》2015,(4)
<正>Tibetan Plateau(TP)is known as"Asia's Water Tower",but it remains an interesting question whether the water supply to the north of the plateau is the same with that to the south.Dr.ZHANG Qibin and coworkers from the State Key Laboratory of Vegetation and Environmental Change.CAS Institute of Botany recently tried to answer it from their studies of tree rings.They found evidences for different moisture conditions on the north and south of the plateau during the past five and a half centuries,and particularly,a"wet south and dry north"scenario occurred during 1463-1502 and 1693-1734 相似文献
11.
《国家科学评论(英文版)》2014,(2)
<正>The highest good is like that of water.he goodness of water is that it beneits all the creatures;yet itself does not scramble,but is content with the places that all men disdain.It is this that makes water so near to Tao.—Tao Te ChingWATER IS IMPORTANT Water is a basic component of human existence,and people and ecosystems depend on it.It is one of the most fundamental requirements for the survival of 相似文献
12.
《中国科学院院刊(英文版)》2016,(1)
正Dr.Jan-Christer Janson is Professor Emeritus at the Department of Chemistry of Uppsala University,Sweden.He is a distinguished bio-separation scientist known for his contributions to modern protein chromatography on an industrial scale,in particular,for the development of cross-linked agarosegel chromatographic media and columns that have been widely used in the bio-pharmaceutical industry. 相似文献
13.
CHEN Zhu 《中国科学院院刊(英文版)》2006,20(1):31-35
Chinese civilization has a long history of 5,000years. It is China's fine tradition to attach importance to ethics and morality, that is "All must regard self-cultivation as the root." Confucius once said that "Benevolence means love of people." He advocated respecting people, concerning about people and caring for people. 相似文献
14.
《中国专利与商标》2007,(4)
Both cancellation and invalidation of the trademark right cause termination of a trademark right.Most national trade- mark laws clearly distinguish the system of trademark can- cellation from that of trademark invalidation.In the current Chinese Trademark Law,however,the concept of"trade- mark right invalidation"is absent.Instead,the term of"can- cellation"is used to refer to the above two circumstances.In fact,"cancellation"as provided for in Article 41 of the 相似文献
15.
《中国专利与商标》2006,(4)
On 27 October 2001, the Standing Committee of the People's Congress reviewed and passed the Amendment to the Copyright Law of the People's Republic of China. In Article 10 of the amended Copyright Law as of 2001 has been incorporated a new subject matter under the copyright protection: the right of communication through information network, that is, the right to make a work available to the public by wire or by wireless means, so that people may have access to the work from a place and at a time individually chosen by them. This is the first time to have put the right of communication through information network in place in the law in China. But, the legislators did not make any specific provisions concerning this right in the Copyright Law. 相似文献
16.
《中国专利与商标》2006,(4)
The case in brief The Beijing Red Lion Paint Co., Ltd. (the RL for short) is a business that manufactures and markets paint, and the proprietor of several registered trademarks of the "RED LION" words, device and the combination thereof. The registered "RED LION" trademark has been, on several occasions, rewarded by the relevant departments the title of Famous Trademark in Beijing. 相似文献
17.
《中国科学院院刊(英文版)》2007,21(4):198-199
The giant panda (Ailuropoda melanoleuca) is not a relic species, and it can survive, according to scientists. Employing microsatellite and mitochondrial control region (CR) sequences as genetic markers, CAS researchers have obtained some key information about the giant panda and its recent evolution history. Their discovery that the lovely creature still possesses high genetic diversity and evolution potentials challenges the hypothesis suggesting the giant panda is facing an"evolutionary dead-end." The research was reported in a recent issue of Molecular Biology and Evolution by a team of scientists led by Prof.WEI Fuwen of the CAS Institute of Zoology and Prof. Michael W.Bruford of Cardiff University. 相似文献
18.
YAN Fusheng 《中国科学院院刊(英文版)》2019,(1)
<正>DNA is the language of life with the alphabet of four nucleobases–adenine (A), thymine (T), guanine(G), and cytosine (C). Language has the power to define and converse, and so does DNA. DNA stores genetic information and defines what a living thing looks like. DNA can also be interpreted into the molecules of RNAs and proteins that are the two key players to support a life and interact or "converse" with other living things. 相似文献
19.
《中国专利与商标》2006,(4)
On 27 October 2001, the Standing Committee of the People‘s Congress reviewed and passed the Amendment to the Copyright Law of the People‘s Republic of China. In Article 10 of the amended Copyright Law as of 2001 has been incorporated a new subject matter under the copyright protection: the right of communication through information network, that is, the right to make a work available to the public by wire or by wireless means, so that people may have access to the work from a place and at a time individu... 相似文献
20.
Myosin X a member of the myosin super-family is the commonest protein in muscle cells contractile properties of muscles. However a recent study clearly shows that it plays a key role in the axonal growth path-finding during the development of nervous system.…… 《中国科学院院刊(英文版)》2007,21(2):88-89
Myosin X,a member of the myosin super-family,is the commonest protein in muscle cells and contractile properties of muscles. However,a recent study clearly shows that it plays a key role in the axonal growth and path-finding during the development of nervous system. 相似文献