71. Identifying the reasons for an emerging phenomenon which involves several complicated factors is far from an easy task . For example , some scientists attribute environmental deterioration to a series of natural factors , while others place the blame solely on inappropriate human behavior .

　　要找到涉及許多復雜因素的新現象的原因遠非一件易事。例如，一些科學家把環境的惡化歸結為一些自然因素，而另一些人把責任都推在人類不適當的行為上。

　　72. One doesn't have to look far to realize the direct correlation between smoking and cancer .

　　人們不用花費很大力氣就能發現抽煙和癌癥之間的直接聯系。

　　73. The explanation for the phenomenon of the rising teenage suicide rate involves many complicated factors . Some attribute the rise to an overemphasis on early success , others point to mounting peer pressure , and still others to confusion over changing social values .

　　對上升的少年自殺率的解釋涉及很多復雜的因素。有的人把上升的原因歸結為過分強調少年時期的成功，有的人指出是因為不斷增長的同伴之間的壓力，還有人認為是對不斷變化的社會價值的迷茫造成的。

　　74. The reasons for antisocial behavior are both complicated and varied . I suggest the phenomenon results from inappropriate role models and the lack of well-defined norms of behavior . However , the main reason is quite likely the continuing degeneration of social values .

　　反社會行為的原因既復雜又多樣。我認為這種現象是不恰當的角色典型和缺少行為規范的很好的定義造成的。然而，主要原因很可能是不斷貶低的社會價值。

　　75. The causes of racial hatred are not readily definable . Sociologists , however , attribute them to the misguided concept of a superior race and an innate mistrust of people of color . Perhaps the main cause is quite simply ignorance .

　　種族仇恨的起因沒有現成的答案。然而，社會學家把原因歸結為被誤導的更高貴的種族的觀念以及天生的對有色人種的不信任。主要原因可能僅僅是因為無知。

　　76. The scourge of HIV/AIDS currently engulfing the world will quite likely be brought under control within the next few years thanks to the untiring efforts of scientists and researchers worldwide .

　　現在席卷世界的艾滋病的禍害很有可能由于全世界科學家和研究人員的不懈努力在未來幾年內得到控制。

　　77. The incidence rate of cancer mainly stems from several factors , including inappropriate diets , poor healthcare practices and the lack of early detection . Continuing medical advances and rising awareness do , however , offer promising hope for the future .

　　癌癥的發病率主要由以下諸多因素引起，包括不適當的飲食、不好的保健習慣以及沒有及早發現。然而，醫學的不斷進步和對此不斷增強的關注給未來帶來了很大的希望。

　　78. Increased urban pollution levels and the mounting death toll from motor vehicles accidents can mainly be attributed to the glut of automobiles appearing on city roads in recent years . Detrimental factors will quite likely outweigh the benefits of rising automobile usage .

　　城市人口的增長和車禍中死亡率的增加主要是由于近年內充斥城市道路的汽車。汽車使用量的增加帶來的有害因素很有可能超過它的好處。

　　79. The rising divorce rate in China can , at least in part , be attributed to spousal incompatibility , disparities in education levels , changing social attitudes and the increasing upward mobility of the younger generation .

　　中國上升的離婚率可以，至少部分可以歸結為婚姻的不和諧，受教育水平的差異，變化的社會看法以及年輕一代不斷增強的上進心。

　　80. State-owned enterprises are not only failing because of inefficient management , but also because of their inability to awitch operational modes from the former planned economy to the new market economy .

　　國有企業失敗不僅由于低效的管理，也因為他們不能實現從以前的計劃經濟到新的市場經濟的運作模式的轉換。

　　81. Although we do not know the long-term consequences of separation or deprivation , we do know that they can produce acute immediate distress .

　　雖然我們不知道分離和喪失親人的長期后果，但我們知道它們能立即引起劇烈的悲痛。

　　82. One can raedily trace the disappearance of dinosaurs to a major cataclysmic event .

　　人們很容易把恐龍消失的原因歸結為重大的災難性事件。

　　83. The raesons for poverty are many , but for the most part center on illiteracy , the lack of opportunities and in some cases pure laziness .

　　貧困的原因很多，但主要是因為缺少教育、缺少機會，有的情況下純粹是由于懶惰。

　　84. Child development depends on a number of factors , both physical and psychological . Correct parental nurturing from infancy through adolescence determines both the physical and mental profile of a mature individual .

　　兒童的發展取決于很多因素，包括生理的和心理的。從嬰兒期到青春期的正確的家長教育決定一個成熟的個人的體質及智力的狀況。

　　85. Factors such as self-condidence and ambition , combined with determination and willpower , contribute to eventual success or failure .

　　自信、雄心，加上決心和毅力等因素是造成最終的成功或失敗的原因。

　　86. Various factors will weigh heavily on China's eventual entry into the World Trade Organization ( WTO ) . One centers on the total abandonment of protectionism , and the other on the adoption of generally accepted international accounting norms .

　　許多因素對中國最終加入世界貿易組織(WTO)有很大的影響。因素之一是徹底放棄保護主義，另一個因素是采用普遍接受的國際會計規范。

　　87. One of the most common failures of people today is to avoid telling the truth . People must realize that avoidance and lying have never in the past and , in fact , never will right a wrong .

　　如今人類最常見的一個不足是不說真話。人們必須意識到不說真話、說謊話在過去沒有，事實上，將來也永遠不會變錯誤為正確。

　　88. Central planning has , at least in part , been blamed for the current demise of state-owned enterprises . Perhaps , however , the greatest blame should be placed on factors such as grossly inefficient management ; the rampant practice of " guanxi " , cronyism and nepotism ; excessively large work forces ; abuses of social benefits ; and without a doubt corruption .

　　人們認為中央計劃至少是現在國有企業失敗的部分原因。然而，最主要的原因可能是極低效的管理、關系的普遍運用、任用親信和裙帶關系、大量過剩的勞動力、社會救濟金的濫用，當然還包括腐敗。

　　89. A recent survey revealed large disparities in the income levels of male and female workers holding the same position . The determining factor should be qualifications , rather than gender , when determining both the salary and position of an individual .

　　最近的一項調查表明在同樣職位上的男性與女性工人的收入水平存在差異。在決定工人工資和職位的時候，決定因素應該是資格，而不是性別。

　　90. Social finesse , willingness to relocate and language capacity are also determinant factora in assessing job qualifications .

　　社交手腕、愿意調動以及語言能力也是評估工作資格的決定性因素。