对贫困的精确定义实际上是很难的。如何在贫穷和非贫穷的人之间划一条界限呢?

　　147. Admittedly , bribery and corruption are endemic to our political and economic systems , but it doesn't necessarily follow that all politicians and business people resort to illicit behavior .

　　诚然，贿赂和腐败在我们的政治和经济系统中很流行，但这并不是说所有的政府官员和商界人士都采取违法行为。

　　148. There's little doubt that a third World War is avoidable , but it is highly unlikely that regional conflicts will disappear in the foreseeable future .

　　毫无疑问，第三次世界大战是可以避免的，但是，在可预见的将来地区冲突消失是非常不可能的。

　　149. Some people assume that investing in stock is a safe pursuit , but their assumption fails to hold water when considering the substantial risk involved .

　　有的人想当然地认为投资股票是有把握的事情，但是，考虑到涉及的巨大风险，他们的想当然就说不通了。

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　　150. Some people have called for accelerated across-the-board changes . Their approach quite frankly ignores the need for gradual but effective changes .

　　一些人要求更快速的全盘改变。他们的做法的确忽略了渐进而有效的改变的必要性。

　　151. There is undoubtedly an element of truth in assertions that capital punishment is necessary , but proponents seem to ignore the fact that the practice has failed to deter heinous crimes .

　　毫无疑问，主张极刑的必要性有正确的成分，但是，支持者似乎忽略了这种做法不能阻止令人发指的罪行这一事实。

　　152. Many people assume that the extinction of a plant or animal species is of little consequence . Careful examination , however , reveals that the extinction of any one species disrupts the food chain , and the loss of a plant species leads to the disappearance of a key ingredient which might yield a cure for cancer .