SDcamps•演辩营全国英语演讲与辩论赛
How to grow old by Bertrand Russell 1、In spite of the title, this article will really be on how not to grow old,which,at my time of life,is a much more important subject.My first advice would be to choose your ancestors.My maternal grandfather,it is true,was cut off in the flower of his youth at the age of sixty-seven,but my other three grandparents all lived to be over eig...
Salt and Metabolism Just how salt became so crucial to our metabolism is a mystery; one appealing theory traces our dependence on it to the chemist ry of the late Cambrian seas. It was there, a half billion years ago, that tiny metazoan organisms first evolved systems for sequestering and circulating fluids. The water of the early oceans might thus have become the chemical p...
Roll Away the Stone I enjoy life because I am endlessly interested in people and their growth. My interest leads me to widen my knowledge of people, and this in turn compels me to believe in the common goodness of mankind. I believe that the normal human heart is born good. That is, it’s born sensitive and feeling, eager to be approved and to approve, hungry for simple happ...
In order to tell what I believe, I must briefly sketch something of my personal history. The turning point of my life was my decision to give up a promising business career and study music. My parents, although sympathetic, and sharing my love of music, disapproved of it as a profession. This was understandable in view of the family background. My grandfather had taught mus...
Plate Tectonics and Sea-floor Spreading The theory of plate tectonics describes the motions of the lithosphere, the comparatively rigid outer layer of the Earth that includes all the crust and part of the underlying mantle.The lithosphere is divided into a few dozen plates of various sizes and shapes, in general the plates are in motion with respect to one another. A mid-oce...
Born to Win Each human being is born as something new, something that never existed before. Each is born with the capacity to win at life. Each person has a unique way of seeing, hearing, touching, tasting and thinking. Each has his or her own unique potentials—capabilities and limitations. Each can be a significant, thinking, aware, and creative being—a producti...
Collectibles 收藏品 Collectibles have been a part of almost every culture since ancient times. 从古代开始，收藏品就是文化的一部分。 Whereas some objects have been collected for their usefulness, others have been selected for their aesthetic beauty alone. 一些物品因它们的有用性被收藏，而另一些则纯粹因为它们的美被收藏。 In theUnited States, the kinds of collectibles currently ...
International Business and Cross-cultural Communication The increase in international business and in foreign investment has created a need for executives with knowledge of foreign languages and skills in cross-cultural communication. Americans, however, have not been well trained in either area and, consequently, have not enjoyed the same level of success in negotiation in ...
新东方优美背诵短文50篇 Unit40:Cohesion-tension Theory 40 Cohesion-tension Theory Atmospheric pressure can support a column of water up to 10 meters high. But plants can move water much higher; the sequoia tree can pump water to its very top more than 100 meters above the ground. Until the end of the nineteenth century, the movement of water in trees and other tall plants was...
An October Sunrise I was up the next morning be fore the October sunrise, and away through the wild and the woodland. The rising of the sun was noble in the cold and warmth of it peeping down the spread of light, he raised his shoulder heavily over the edge of grey mountain and wavering length of upland. Beneath his gaze the dew-fogs dipped, and crept to crept to the hollow ...
American Black Bears American black bears appear in a variety of colors despite their name. In the eastern part of their range, most of these bears have shiny black fur, but in the west they grow brown, red, or even yellow coats. To the north, the black bear is actually gray or white in color. Even in thesame litter, both brown and black furred bears may be born. Black bears...
The Alaska Pipeline The Alaska pipeline starts at the frozen edge of the Arctic ocean. It stretches southward across the largest and northernmost state in the United States,ending at a remote ice free seaport village nearly 800 miles from where it begins. It is massive in size and extremely complicated to operate.The steel pipe crosses windswept plains and endless miles of d...
Botany Botany, the study of plants, occupies a peculiar position in the history of human knowledge.For many thousands of years it was the one field of awareness about which humans had anything more than the vaguest of insights. It is impossible to know today just what our Stone Age ancestors knew about plants, but from what we can observe of preindustrial societies that stil...
松树 松树几乎总是长在凌乱荒凉地地方，但它却把周围的景色点缀得井井有条，蔚然可观。低地上的树木会东倒西歪，虽说使它们弓腰曲背的，不过是草地上吹过的一阵阵微风；或者，它们的躯干歪到一边，不过时由于一排野樱草的影响。可是，尽管风暴和寻崩姿意摧残，尽管松树所能依附的只是陡壁上一块凸出的岩石，它依然长得笔挺。从它初发的嫩枝旁沿茎插一根笔直的杆子，只要这树活着，杆子将一直指着地的中心。...
James Watt And The Teakettle A little Scotch boy was sitting in his grandmother’s kit- chen. He was watching the red flames in the wide open fire- place and quietly wondering about the causes of things. In- deed, he was always wondering and always wanting to know. “Grandma,” he presently asked, “what makes the fire burn ?” This was not the first...
Love of Life Two men walked slowly, one after the other, through the low water of a river. It ran cold over their feet. They had blanket packs on their backs; guns, but no bullets; matches, but no food. Suddenly the man behind fell over a stone, hurt his foot badly and called: “Hey, Bill, I’ve hurt my foot.” Bill continued without looking back. The man was ...
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...
新东方优美背诵短文50篇 Unit37:Icebergs 37 Icebergs Icebergs are among nature’s most spectacular creations, and yet most people have never seen one. A vague air of mystery envelops them. They come into being —– somewhere ——in faraway, frigid waters, amid thunderous noise and splashing turbulence, which in most cases no one hears or sees. They exist onl...
Abundance is a Life Style Abundance is a life style, a way of living your life. It isn’t something you buy now and then or pull down from the cupboard, dust off and use once or twice, and then return to the cupboard. Abundance is a philosophy; it appears in your physiology, your value system, and carries its own set of beliefs. You walk with it, sleep with it, bath with it, ...
新东方优美背诵短文50篇 Unit38:Topaz 38 Topaz Topaz is a hard, transparent mineral. It is a compound of aluminum, silica, and fluorine. Gem topaz is valuable. Jewelers call this variety of the stone “precious topaz”. The best-known precious topaz gems range in color from rich yellow to light brown or pinkish red. Topaz is one of the hardest gem minerals. In the mineral table ...