SDcamps•演辩营全国英语演讲与辩论赛
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...
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...
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...
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...
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...
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...
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 Archaeological data are historical documents in their own right, not mere illustrations to written texts.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...
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...
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...
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...
Gettysburg Address Fourscore and seven years ago, our fathers brought forth upon this continent a new nation, conceived in liberty and dedicated to the proposition that all men are created equal. Now, we are engaged in a great civil war, testing whether that nation or any nation so conceived and so dedicated, can long endure. We are met on a great battlefield of that war. We...
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...
The Origin of Refrigerators By the mid-nineteenth century, the term”icebox”had entered the American language, but ice was still only beginning to affect the diet of ordinary citizens in the United States. The ice trade grew with the growth of cities.Ice was used in hotels, taverns,and hospitals,and by some forward-looking city dealers in fresh meat,fresh fish,and...
Children’s Numerical Skills People appear to be born to compute. The numerical skills of children develop so early and so inexorably that it is easy to imagine an internal clock of mathematical maturity guiding their growth. Not long after learning to walk and talk, they can set the table with impressive accuracy — one knife, one spoon, one fork, for each of the ...
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...
Television Television — the most pervasive and persuasive of modern technologies,marked by rapid change and growth –is moving into a new era,an era of extraordinary sophistication and versatility, which promises to reshape our lives and our world. It is an electronic revolution of sorts, made possible by the marriage of television and computer technologies. The ...
Oil Refining An important new industry, oil refining, grew after the Civil War. Crude oil, or petroleum — a dark, thick ooze from the earth — had been known for hundreds of years, but little use had ever been made of it. In the 1850’s Samuel M. Kier, a manufacturer in western Pennsylvania, began collecting the oil from local seepages and refining it into ke...
The Nobel Academy For the last 82 years, Sweden’s Nobel Academy has decided who will receive the Nobel Prize in Literature, thereby determining who will be elevated from the great and the near great to the immortal. But today the Academy is coming under heavy criticism both from the without and from within. Critics contend that the selection of the winners often has le...
编者按： 青春不是年华，而是心境；青春不是桃面、丹唇、柔膝，而是深沉的意志，恢宏的想象，炙热的恋情；青春是生命的深泉在涌流。 Youth Youth is not a time of life; it is a state of mind; it is not a matter of rosy cheeks, red lips andsuppleknees; it is a matter of the will, a quality of the imagination, a vigor of the emotions; it is the freshness of the deep springs of life. You...
引言： 回首那个糟糕的夏天，我很快就明白了，所有后来出现的好事只不过与坏事相互抵消。比一般情况糟糕的境遇不会延宕过久；而太平时光是我应得的，我要尽情享受，它们为我注入活力以应对下一个险情，并确保我可以兴旺发达。 The 50-Percent Theory of Life I believe in the 50-percent theory. Half the time things are better than normal; the other half, they are worse. I believe life is apend...