Cells and Temperature Cells cannot remain alive outside certain limits of temperature and much narrower limits mark the boundaries of effective functioning. Enzyme systems of mammals and birds
The Salinity of Ocean Waters If the salinity of ocean waters is analyzed, it is found to vary only slightly from place to place. Nevertheless, some of these small changes are important. There are thre
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 a
Types of Speech Standard usage includes those words and expressions understood, used, and accepted by a majority of the speakers of a language in any situation regardless of the level of formality. As
Movie Music Accustomed though we are to speaking of the films made before 1927 as "silent", the film has never been, in the full sense of the word, silent. From the very beginning, music was regarded
The Beginning of Drama There are many theories about the beginning of drama in ancient Greece. The on most widely accepted today is based on the assumption that drama evolved from ritual. The argument
44.Obtaining Fresh water from icebergs The concept of obtaining fresh water from icebergs that are towed to populated areas and arid regions of the world was once treated as a joke more appropriate to
Plankton浮游生物. Scattered through the seas of the world are billions of tons of small plants and animals called plankton. Most of these plants and animals are too small for the human eye to see. They dr
Evolution of sleep Sleep is very ancient. In the electroencephalographic sense we share it with all the primates and almost all the other mammals and birds: it may extend back as far as the reptiles.
英语精美散文欣赏:After A Long Winter NSDA“SDcamps”全国英语演讲与辩论大赛（大学组）/SDcamps全国中小学生英语演讲与辩论大会（中小学及幼儿组）/美式辩论赛（以下简称大赛/大会）现诚招全国省市合作伙伴或城市合伙人，共同进行推广NSDA赛事品牌、举办赛事及培训活动、开展素质教育、美式营地项目等多方面合作。 我们希望认同NSDA理念，有赛事组织经验，或有教育资源，特
Love 爱情 I love you not because of who you are,but because of who I am when I am with you. 我爱你，不是因为你是一个怎样的人，而是因为我喜欢与你在一起时的感觉。 No man or woman is worth your tears,and the one who is ,won't make you cry.
相关专题: 精美英文欣赏 美丽英文诵读 To respect my work, my associates and myself. To be honest and fair with them as I expect them to be honest and fair with me. To be a man whose word carries weight. To be a 1) boos
A Grain of Sand 一粒沙子 William Blake/威廉.布莱克 To see a world in a grain of sand, And a heaven in a wild fllower, Hold infinity in the palm of your hand, And eternity in an hour. 从一粒沙子看到一个世界， 从一朵野花看到一个天堂，
相关专题: 精美英文欣赏 美丽英文诵读 At a young and tender age, Patti Wilson was told by her doctor that she was an epileptic. Her father, Jim Wilson, is a morning jogger. One day she smiled through her braces and sai
General Douglas MacArthur: Farewell Address to Congress Mr. President, Mr. Speaker, and Distinguished Members of the Congress: I stand on this rostrum with a sense of deep humility and great pride --
Moderator: Ladies and Gentlemen: The President of the United States, Ronald Reagan. President Reagan: Thank you. Thank you very much. Thank you very much. Thank you very much. Thank you very much. And
John F. Kennedy: "Ich bin ein Berliner" ("I am a 'Berliner'") I am proud to come to this city as the guest of your distinguished Mayor, who has symbolized throughout the world the fighting spirit of W
John F. Kennedy: Inaugural Address [Administering of the Oath of Office] Vice President Johnson, Mr. Speaker, Mr. Chief Justice, President Eisenhower, Vice President Nixon, President Truman, Reverend
Malcolm X: "The Ballot or the Bullet" (Photo not taken on this occasion) Mr. Moderator, Reverend Cleage, Brother Lomax, brothers and sisters, and friends and I see some enemies. In fact, I think we’d
President Anderson, members of the faculty, board of trustees, distinguished guests, my old colleague, Senator Bob Byrd, who has earned his degree through many years of attending night law school, whi
