【導(dǎo)讀】，或稱叉角羚，是該大陸典型的草原動(dòng)物。目睹它在二十一世紀(jì)的回歸呢？在全人類是共通的。，其對(duì)水，交通和垃圾處理的需求就會(huì)越大。，直接，有力的寫作難于花哨，含混而意義模糊的表達(dá)。太嚴(yán)肅的內(nèi)部裝飾來(lái)使其具有親切感。，而后者是口頭的。性，并且能夠使某些藍(lán)色植物染料變紅。夠賦予歌曲感情深度的能力。噪聲來(lái)與人交流了。植物才能生存的地方旺盛的生長(zhǎng)。術(shù)來(lái)記錄觀測(cè)結(jié)果，而這樣記錄下來(lái)的觀測(cè)結(jié)果是供他人核查的。，而腐化過(guò)程將化學(xué)物質(zhì)回饋于土壤，提高其肥力，并分解動(dòng)物糞便。，產(chǎn)生幾乎純質(zhì)的音調(diào)，其音量經(jīng)久不衰。伊利諾州也能看見(jiàn)它們。

　　

【正文】 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 coalrich regions of the United States. 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 pleted, the really challenging task remained: the dangerous, sweaty, backbreaking, brawling business of actually building the lines. 路的說(shuō)服和規(guī)劃工作終于完成后，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。 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. ，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 naturalborn citizen, thirtyfive years of age or older, who has lived in the United States for a minimum of fourteen years. ，三十五歲以上，并且在美國(guó)居住了至少十四年。 91. Arid 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 desert. ，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。 92. Stone does decay, and so tools of long ago have remained when even the bones of the man who made them have disappeared without trace. ，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。 93. Insects would make it impossible for us to live in the world。 they would devour all our crops and kill our f locks and herds, if it were not for the protection we get from insecteating animals. ；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。 94. It 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 excitement. ，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。 95. There 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 is. ：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。 96. I find young people exciting. They have an air of freedom, and they have not a dreary mitment to mean amb itions or love fort. They are not anxious social climbers, and they have no devotion to material things. 。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。 97. I 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 battlefield. ，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。 98. It 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 most savage bative instincts are around. ：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)。 99. It has been found that certain bats emit squeaks and by receiving the echoes, they can place and steer clear of obstaclesor locate flying insects on which they feed. This echo in bats is often pared with radar, the principle of which is similar. ，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。 100. As 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 failure. ，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。 2.