精美短文 第86篇:The Humming-Bird 蜂鸟
蜂鸟 在一切生物中，要算蜂鸟体型最优美、颜色最鲜艳。经过工艺加工和各种宝石和金属是无法跟这个大自然的珍宝媲美的。大自然按照鸟类的大小把它列为最小号，真是”最小的绝妙珍品”。这咱小蜂鸟是大自然的杰作。大自然把其他鸟类只能分其中一部分的种种天赋全部慷慨地给了它。这个小宠儿具有轻盈、敏捷、灵活、优雅以及羽毛绚丽等一切妙外。那翠绿的、艳红的、嫩黄色的羽毛闪闪发光。蜂鸟从不让...
精美短文 第39篇:Oil and Water油和水
Oil and Water To understand the emulsifying process, we must first accept the scientific principle that oil and water do not naturally mix. Quite literally, they find each other’s presence repulsive. A good illustration of this aversion is homemade oil and vinegar salad dressing.When you shake or beat your salad dressing, you do more than disperse the oil throughout th...
精美短文 第55篇:Suburbanization郊区的发展
Suburbanization If by “suburb” is meant an urban margin that grows more rapidly than its already developed interior, the process of suburbanization began during the emergence of the industrial city in the second quarter of the nineteenth century. Before that period the city was a small highly compact cluster in which people moved about on foot and goods were con...
精美短文 第37篇:Nitinol 镍钛合金
Nitinol Nitinol is one of the most extraordinary metals to be discovered this century: A simple alloy of nickel and titanium, nitinol has some perplexing properties. A metal with a memory, it can be made to remember any shape into which it is fashioned, returning to that shape whenever it is heated. For example, a piece of nitinol wire bent to form a circle that is then heat...
精美短文 第13篇:Chimpanzee黑猩猩
Chimpanzee The most striking single fact about chimpanzees is the flexibility of their social life, the lack of any rigid form of organization. It represents about as far a departure from the baboon type of organization as one can find among the higher primates, and serves to emphasize the great variety of primate adaptations. Chimpanzees are more human than baboons, or rath...
精美短文 第33篇:Modern American Universities现代美国大学
Modern American Universities Before the 1850’s, the United States had a number of small colleges,most of them dating from colonial days. They were small, church connected institutions whose primary concern was to shape the moral character of their students. Throughout Europe, institutions of higher learning had developed, bearing the ancient nameof university. In Germa...
精美短文 第54篇:Statistics统计学
Statistics There were two widely divergent influences on the early development of statistical methods. Statistics had a mother who was dedicated to keeping orderly records of governmental units (state and statistics come from the same Latin root status) and a gentlemanly gambling father who relied on mathematics to increase his skill at playing the odds in games of chance. ...
精美短文 第63篇:The Revolution in American美国高等教育的革命
The Revolution in American Higher Education To produce the upheaval in the United States that changed and modernized the domain of higher education from the mid 1860’s to the mid 1880’s, three primary causes interacted. The emergence of a half dozen leaders in education provided the personal force that was needed. Moreover, an outcry for a fresher, more practical...
精美短文 第52篇:Skyscrapers and Environment摩天大楼与环境
Skyscrapers and Environment In the late 1960’s,many people in North America turned their attention to environmental problems,and new steel-and-glass skyscrapers were widely criticized.Ecologists pointed out that a cluster of tall buildings in a city often overburdens public transportation and parking lot capacities. Skyscrapers are also lavish consumers, and wasters, o...
精美短文 第102篇:Spring春天
Spring Spring, the sweet Spring, is the year’s pleasant king(1); Then blooms each thing, then maids dance in a ring, Cold doth not sting(2), the pretty birds do sing(3), Cuckoo, jug-jug, pu-we, to-witta-woo!(4) The palm(5) and may(6) make country houses gay, Lambs frisk’ and play, the shepherds pipe all day, And we hear aye birds tune this merry lay,(7) Cuckoo, j...
精美短文 第53篇:Sleep睡眠
Sleep Sleep is part of a person’s daily activity cycle. There are several different stages of sleep, and they too occur in cycles. If you are an average sleeper, your sleep cycle is as follows. When you first drift off into slumber, your eyes will roll about a bit, your temperature will drop slightly, your muscles will relax, and your breathing well slow and become qui...
精美短文 第72篇:The Origin of Sports体育的起源
The Origin of Sports When did sport begin? If sport is, in essence, play, the claim might be made that sport is much older than humankind, for, as we all have observed, the beasts play. Dogs and cats wrestle and play ball games.Fishes and birds dance.The apes have simple, pleasurable games. Frolicking infants, school children playing tag, and adult arm wrestlers are emonstra...
精美短文 第84篇:A Lesson Learned at Midnight
A Lesson Learned at Midnight By James Q. DuPont Ever since one midnight, in nineteen hundred and nine, when I first heard my mother crying, I have been groping for beliefs to help me through the rough going and confusions of life. My dad’s voice was low and troubled as he tried to comfort Mother. And in their anguish, they both forgot the nearness of my bedroom. And so, I ov...
精美短文 第81篇:在思考中成长
Growth That Starts From Thinking It seems to me a very difficult thing to put into words the beliefs we hold and what they make you do in your life. I think I was fortunate because I grew up in a family where there was a very deep religious feeling. I don’t think it was spoken of a great deal. It was more or less taken for granted that everybody held certain beliefs and nee...
精美短文 第45篇:Police and Communities警察与社区
Police and Communities Few institutions are more important to an urban community than its police, yet there are few subjects historians know so little about. Most of the early academic interests developed among political scientists and sociologists, who usually examined their own contemporary problems with only a nod toward the past. Even the public seemed concerned only dur...
精美短文 第6篇:Archaeology考古学
Archaeology Archaeology is a source of history, not just a humble auxiliary discipline. Archaeological data are historical documents in their own right, not mere illustrations to written texts. Just as much as any other historian, an archaeologist studies and tries to reconstitute the process that has created the human world in which we live — and us ourselves in so f...
精美短文 第32篇:Mimicry in Plants植物拟态
Mimicry in Plants Plant adaptations can be remarkably complex. Certain species of orchids, for instance, imitate female bees, other plants look and smell like dead animals, and still others have the appearance of stones. These strange adaptations to life represent just a few of the sophisticated means by which plants enhance their chances of survival. Mimicry in plants or an...
精美短文 第65篇:美国革命的历史意义
The Historical Significance of American Revolution The ways of history are so intricate and the motivations of human actions so complex that it is always hazardous to attempt to represent events covering a number of years, a multiplicity of persons, and distant localities as the expression of one intellectual or social movement; yet the historical process which culminated in...
精美短文 第62篇:Women in Colonial North America北美殖民时期的妇女
Women in Colonial North America The status of women in colonial North America has been well studied and described and can be briefly summarized. Throughout the colonial period there was a marked shortage of women, which varied with the regions and was always greatest in the frontier areas. This favorable ratio enhanced women’s status and position and allowed them to pu...
精美短文 第31篇:Mars火星
MARS Mars According to the best evidence gathered by space probes and astronomers, Mars is an inhospitable planet, more similar to Earth’s Moon than to Earth itself-a dry,stark,seemingly lifeless world. Mars’ air pressure is equal to Earth’s at an altitude of 100,000 feet. The air there is 95% carbon dioxide. Mars has no ozone layer to screen out the Sun...