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(fù)雜因素的新現(xiàn)象的原因遠(yuǎn)非一件易事。例如，一些科學(xué)家把環(huán)境的惡化歸結(jié)為一些自然因素，而另一些人把責(zé)任都推在人類不適當(dāng)?shù)男袨樯稀?/P>
72. One doesn’t have to look far to realize the direct correlation between smoking and cancer .
人們不用花費(fèi)很大力氣就能發(fā)現(xiàn)抽煙和癌癥之間的直接聯(lián)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(duì)上升的少年自殺率的解釋涉及很多復(fù)雜的因素。有的人把上升的原因歸結(jié)為過(guò)分強(qiáng)調(diào)少年時(shí)期的成功，有的人指出是因?yàn)椴粩嘣鲩L(zhǎng)的同伴之間的壓力，還有人認(rèn)為是對(duì)不斷變化的社會(huì)價(jià)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(huì)行為的原因既復(fù)雜又多樣。我認(rèn)為這種現(xiàn)象是不恰當(dāng)?shù)慕巧湫秃腿鄙傩袨橐?guī)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(huì)價(jià)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(méi)有現(xiàn)成的答案。然而，社會(huì)學(xué)家把原因歸結(jié)為被誤導(dǎo)的更高貴的種族的觀念以及天生的對(duì)有色人種的不信任。主要原因可能僅僅是因?yàn)闊o(wú)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(xiàn)在席卷世界的艾滋病的禍害很有可能由于全世界科學(xué)家和研究人員的不懈努力在未來(lái)幾年內(nèi)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(fā)病率主要由以下諸多因素引起，包括不適當(dāng)?shù)娘嬍�、不好的保健�?xí)慣以及沒(méi)有及早發(fā)現(xiàn)。然而，醫(yī)學(xué)的不斷進(jìn)步和對(duì)此不斷增強(qiáng)的關(guān)注給未來(lái)帶來(lái)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(zhǎng)和車(chē)禍中死亡率的增加主要是由于近年內(nèi)充斥城市道路的汽車(chē)。汽車(chē)使用量的增加帶來(lái)的有害因素很有可能超過(guò)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(guó)上升的離婚率可以，至少部分可以歸結(jié)為婚姻的不和諧，受教育水平的差異，變化的社會(huì)看法以及年輕一代不斷增強(qiáng)的上進(jìn)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(guó)有企業(yè)失敗不僅由于低效的管理，也因?yàn)樗麄儾荒軐?shí)現(xiàn)從以前的計(jì)劃經(jīng)濟(jì)到新的市場(chǎng)經(jīng)濟(jì)的運(yùn)作模式的轉(zhuǎn)換。
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