【文章內(nèi)容簡(jiǎn)介】 where his students in advanced position found him terrifyingly frigid in the classroom but sympathetic and understanding in their personal ，但是William Rainey Harper把他吸引到了新成立的芝加哥大學(xué)。他在那里正式任職長(zhǎng)達(dá)整整一代人的時(shí)間。他的高級(jí)作文課上的學(xué)生覺(jué)得他在課上古板得可怕，但私下交流卻富有同情和理解。 sloth pays such little attention to its personal hygiene that green algae grow on its coarse hair and munities of a parasitic moth live in the depths of its coat producing caterpillars which graze on its mouldy muscles are such that it is quits incapable of moving at a speed of over a kilometer an hour even over the shortest distances and the swiftest movement it can make is a sweep of its hooked ，以至于它粗糙的毛發(fā)上生出綠苔，成群的寄生蛾生長(zhǎng)在它的皮毛深處，變成毛毛蟲，并以它的臟毛為食。她的肌肉不能讓他哪怕在很短的距離以內(nèi)以每小時(shí)一公里的速度移動(dòng)。它能做的最敏捷的動(dòng)作就是揮一揮它彎曲的胳膊。 flowers are used for scientific as well as for decorative are made from a variety of materials, such as way and glass, so skillfully that they can scarcely be distinguished from natural ，也可用于裝飾目的，它們可以用各種各樣的材料制成，臂如蠟和玻璃；其制作如此精巧，幾乎可以以假亂真。 years of research at an abandoned coal mine in Argonne, Illinois, have resulted in findings that scientists believe can help reclaim thousands of mine disposal sites that scar the coalrich regions of the United ，科學(xué)家們相信這些成果可以幫助改造把美國(guó)產(chǎn)煤區(qū)弄得傷痕累累的數(shù)千個(gè)舊煤場(chǎng)。 the persuading and the planning for the western railroads had finally been pleted, the really challenging task remained: the dangerous, sweaty, backbreaking, brawling business ofactually building the ，真正艱難的任務(wù)還沒(méi)有開(kāi)始；即危險(xiǎn)，吃力，需要傷筋動(dòng)骨和吵吵嚷嚷的建造這些鐵路的實(shí)際工作。 of the space crunch, the Art Museum has bee increasingly cautious in considering acquisitions and donations of art, in some cases passing up opportunities to strengthen is coll，藝術(shù)博物館在考慮購(gòu)買和接受捐贈(zèng)的藝術(shù)品是越來(lái)越慎重，有些情況下放棄其進(jìn)一步改善收藏的機(jī)會(huì)。 United States Constitution requires that President be a naturalborn citizen, thirtyfive years of age or older, who has lived in the United States for a minimum of fourteen ，三十五歲以上，并且在美國(guó)居住了至少十四年。 regions in the southwestern United States have bee increasingly inviting playgrounds for the growing number of recreation seekers who own vehicles such as motorcycles or powered trail bikes and indulge in hillclimbing contests or in caving new trails in the ，對(duì)越來(lái)越多擁有摩托車或越野單車類車輛的，喜歡放縱于爬坡比賽或開(kāi)辟新的沙漠通道的尋歡作樂(lè)者具有不斷增長(zhǎng)的吸引力。 does decay, and so tools of long ago have remained when even the bones of the man who made them have disappeared without ，所以以前的(石器)工具能保存下來(lái)，雖然它們的制造者已經(jīng)消失的無(wú)影無(wú)蹤。 would make it impossible for us to live in the world。they would devour all our crops and kill our flocks and herds, if it were not for the protection we get from insecteating ；如果我們沒(méi)有受到以昆蟲為食的動(dòng)物的保護(hù)，昆蟲就會(huì)吞嚼掉我們所有的莊稼并殺死我們飼養(yǎng)的禽獸。 is true that during their explorations they often faced difficulties and dangers of the most perilous nature, equipped in a manner which would make a modern climber shudder at the thought, but they did not go out of their way to court such ，他們?cè)谔诫U(xiǎn)中遇到了極具威脅性的困難和危險(xiǎn)，而他們的裝備會(huì)讓一個(gè)現(xiàn)代登山者想一想都會(huì)渾身顫栗。不過(guò)他們并不是刻意去追求刺激的。 is only one difference between an old man and a young one: the young man has a glorious future before him and old one has a splendid future behind him: and maybe that is where the rub ：年輕人的前面有輝煌的未來(lái)，老年人燦爛的未來(lái)卻已在它們身后。這也許就是困難之所在。 find young people have an air of freedom, and they have not a dreary mitment to mean ambitions or love are not anxious social climbers, and they haveno devotion to material 。它們帶有自由的氣息，他們不會(huì)為狹隘的野心和貪婪享受而孜孜以求。他們不是焦慮的向上爬的人，他們不會(huì)對(duì)物質(zhì)性的東西難舍難分。 am always amazed when I hear people saying that sport creates goodwill between the nations, and that if only the mon peoples of the world could meet one another at football or cricket, they would have no inclination to meet on the ，說(shuō)世界各地的普通人只要能在足球場(chǎng)或板球場(chǎng)上相遇就會(huì)沒(méi)有興趣在戰(zhàn)場(chǎng)上相遇的話，我都倍感詫異。 is impossible to say simply for the fun and exercise: as soon as the question of prestige arises, as soon as you feel that you and some larger unit will be disgraced if you lose, the mostsavage bative instincts are ：一旦有了問(wèn)題，一旦你覺(jué)得你輸了你和你所屬團(tuán)體會(huì)有失體面時(shí)，你最野蠻的好斗本能就會(huì)被激發(fā)出來(lái)。 has been found that certain bats emit squeaks and by receiving the echoes, they can locate and steer clear of obstaclesor locate flying insects on which they echolocation in bats is often pared with radar, the principle of which is ，某些蝙蝠發(fā)出尖叫聲并靠接受回響來(lái)鎖定和避免障礙物——或者找到它們賴以為生的昆蟲。蝙蝠這種回響定位法常拿來(lái)和原理與之很相近似的雷達(dá)相比。 the time and cost of making a clip drop to a few days and a few hundred dollars, engineers may soon be free to let their imaginations soar without being penalized by expensive failur，工程師們可能很快可以任他們的想象馳騁而不會(huì)被昂貴的失敗所懲罰。第二篇：50個(gè)句子記完的7000單詞——俞敏洪俞敏洪從100套真題中提煉而出的100百個(gè)經(jīng)典句子 of the grassland dwellers of the continent is the American antelope, or ，或稱叉角羚，是該大陸典型的草原動(dòng)物。 the millions who saw Haley’s et in 1986, how many people will live long enough to see it return in the twentyfirst ，有多少人能夠長(zhǎng)壽到足以目睹它在二十一世紀(jì)的回歸呢？ have discovered that fear, happiness, sadness, and surprise are universally reflected in facial ，恐懼，快樂(lè)，悲傷和驚奇都會(huì)行之于色，這在全人類是共通的。 of its irritating effect on humans, the use of phenol as a general antiseptic has been largely ，它基本上已不再被當(dāng)作常用的防腐劑了。 group to remain in existence, a profitmaking organization must, in the long run, produce something consumers consider useful or ，最終都必須生產(chǎn)出消費(fèi)者可用或需要的產(chǎn)品。 greater the population there is in a locality, the greater the need there is for water, transportation, and disposal of ，其對(duì)水，交通和垃圾處理的需求就會(huì)越大。 is more difficult to write simply, directly, and effectively than to employ flowery but vague expressions that only obscure one’s ，直接，有力的寫作難于花哨，含混而意義模糊的表達(dá)。 modern offices being more mechanized, designers are attempting to personalize them with warmer, less severe ，設(shè)計(jì)師們正試圖利用較為溫暖而不太嚴(yán)肅的內(nèi)部裝飾來(lái)使其具有親切感。 difference between libel and slander is that libel is printed while slander is ，而后者是口頭的。 knee is the joints where the thigh bone meets the large bone of the lower 。 are chemical pounds that, in water solution, have a sharp taste, a corrosive action on metals, and the ability to turn certain blue vegetable dyes ，它在溶于水時(shí)具有強(qiáng)烈的氣味和對(duì)金屬的腐蝕性，并且能夠使某些藍(lán)色植物染料變紅。 Holiday’s reputation as a great jazzblues singer rest