【正文】 weaty, backbreaking, brawling business of actually building thelines.，真正艱難的任務(wù)還沒有開始；即危險，吃力，需要傷筋動骨和吵吵嚷嚷的建造這些鐵路的實際工作。89. Because of the space crunch, the Art Museum has bee increasingly cautious in consideringacquisitions and donations of art, in some cases passing up opportunities to strengthen is collections.，藝術(shù)博物館在考慮購買和接受捐贈的藝術(shù)品是越來越慎重，有些情況下放棄其進(jìn)一步改善收藏的機會。90. The United States Constitution requires that President be a naturalborn citizen, thirtyfive years of ageor older, who has lived in the United States for a minimum of fourteen years.，三十五歲以上，并且在美國居住了至少十四年。91. Arid regions in the southwestern United States have bee increasingly inviting playgrounds for thegrowing number of recreation seekers who own vehicles such as motorcycles or powered trail bikes andindulge in hillclimbing contests or in caving new trails in the desert.，對越來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辟新的沙漠通道的尋歡作樂者具有不斷增長的吸引力。92. Stone does decay, and so tools of long ago have remained when even the bones of the man who madethem have disappeared without trace.，所以以前的(石器)工具能保存下來，雖然它們的制造者已經(jīng)消失的無影無蹤。93. Insects would make it impossible for us to live in the world。 they would devour all our crops and kill ourflocks and herds, if it were not for the protection we get from insecteating animals.；如果我們沒有受到以昆蟲為食的動物的保護(hù)，昆蟲就會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 perilousnature, equipped in a manner which would make a modern climber shudder at the thought, but they did notgo out of their way to court such excitement.，他們在探險中遇到了極具威脅性的困難和危險，而他們的裝備會讓一個現(xiàn)代登山者想一想都會渾身顫栗。不過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 futurebefore 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，老年人燦爛的未來卻已在它們身后。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 tomean ambitions or love fort. They are not anxious social climbers, and they have no devotion to materialthings.。它們帶有自由的氣息，他們不會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，他們不會對物質(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 thatif only the mon peoples of the world could meet one another at football or cricket, they would have noinclination to meet on the battlefield.，說世界各地的普通人只要能在足球場或板球場上相遇就會沒有興趣在戰(zhàn)場上相遇的話，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 soonas you feel that you and some larger unit will be disgraced if you lose, the most savage bative instinctsare around.：一旦有了問題，一旦你覺得你輸了你和你所屬團(tuán)體會有失體面時，你最野蠻的好斗本能就會被激發(fā)出來。99. It has been found that certain bats emit squeaks and by receiving the echoes, they can locate and steerclear of obstaclesor locate flying insects on which they feed. This echolocation in bats is often paredwith radar, the principle of which is similar.，某些蝙蝠發(fā)出尖叫聲并靠接受回響來鎖定和避免障礙物——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 maysoon 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被昂貴的失敗所懲罰。1. 若不給自己設(shè)限，則人生中就沒有限制你發(fā)揮的藩籬。2. 若不是心寬似海，哪有人生風(fēng)平浪靜。在紛雜的塵世里，為自己留下一片純靜的心靈空間，不管是潮起潮落，也不管是陰晴圓缺，你都可以免去浮躁，義無反顧，勇往直前，輕松自如地走好人生路上的每一步3. 花一些時間，總會看清一些事。用一些事情，總會看清一些人。有時候覺得自己像個神經(jīng)病。既糾結(jié)了自己，又打擾了別人。努力過后，才知道許多事情，堅持堅持，就過來了。4. 歲月是無情的，假如你丟給它的是一片空白，它還給你的也是一片空白。歲月是有情的，假如你奉獻(xiàn)給她的是一些色彩，它奉獻(xiàn)給你的也是一些色彩。你必須努力，當(dāng)有一天驀然回首時，你的回憶里才會多一些色彩斑斕，少一些蒼白無力。只有你自己才能把歲月描畫成一幅難以忘懷的人生畫卷。