81. 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. 電視，這項(xiàng)從迅速變化和成長(zhǎng)為標(biāo)志的最普及和最有影響力的現(xiàn)代技術(shù)，正在步入一個(gè)新時(shí)代，一個(gè)極為成熟和多樣化的時(shí)代，這將重塑我們的生活和世界。

　　82. Television is more than just an electronics;it is a means of expression，as well as a vehicle for communication，and as such becomes a powerful tool for reaching other human beings. 電視不僅僅是一件電器;它是表達(dá)的手段和交流的載體并因此成為聯(lián)系他人的有力工具。

　　83. Even more shocking is the fact that the number and rate of imprisonment have more than doubled over the past twenty years，and recidivism——that is the rate for re-arrest——is more than 60 percent. 更讓人吃驚的事實(shí)是監(jiān)禁的數(shù)目和比例在過去的二十年中翻了一番還有余，以及累犯率——即再次拘押的比例——為百分之六十強(qiáng)。

　　84. His teaching began at the Massachusetts Institute of Technology，but William Rainey Harper lured him to the new university of Chicago，where he remained officially for exactly a generation and where his students in advanced composition found him terrifyingly frigid in the classroom but sympathetic and understanding in their personal conferences. 他的教書生涯始于麻省理工學(xué)院，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)生覺得他在課上古板得可怕，但私下交流卻富有同情和理解。

　　85. The sloth pays such little attention to its personal hygiene that green algae grow on its coarse hair and communities of a parasitic moth live in the depths of its coat producing caterpillars which graze on its mouldy hair. Its 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 arm. 樹獺即不講究衛(wèi)生，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。

　　86. Artificial flowers are used for scientific as well as for decorative purposes. They are made from a variety of materials，such as way and glass，so skillfully that they can scarcely be distinguished from natural flowers. 人造花卉即可用于科學(xué)目的，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。

　　87. Three 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 coal-rich regions of the United States. 在伊利諾州Angonne市的一個(gè)廢棄煤礦的三年研究取得了成果，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)。

　　88. When the persuading and the planning for the western railroads had finally been completed，the really challenging task remained：the dangerous，sweaty，backbreaking，brawling business of actually building the lines. 當(dāng)有關(guān)西部鐵路的說服和規(guī)劃工作終于完成后，真正艱難的任務(wù)還沒有開始;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。

　　89. Because of the space crunch，the Art Museum has become increasingly cautious in considering acquisitions and donations of art，in some cases passing up opportunities to strengthen is collections. 由于空間不足，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)。

　　90. The United States Constitution requires that President be a natural-born citizen，thirty-five years of age or older，who has lived in the United States for a minimum of fourteen years. 美國(guó)憲法要求總統(tǒng)是生于美國(guó)本土的公民，三十五歲以上，并且在美國(guó)居住了至少十四年。

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