1.The basic stumbling block to global peace rests with the self-serving ambitions of many nations.

　　全世界和平的基本障碍物在于许多国家谋私利的野心。

　　2.The overemphasis on one particular aspect of a problem often obscures the relevance of other issues.

　　过分强调问题的一个方面经常掩盖了其他方面的相关性。

　　3.Any presumption that smoking is in anyway beneficial is totally preposterous.

　　任何对抽烟不管怎样是有益的假设都是完全荒谬的。

　　4.The fallacies of many arguments are quite obvious.

　　许多论证的推论错误是相当明显的。

　　5.Arbitrarily dismissing the direct link between increasing sexual promiscuity and the rapid spread of sexually transmitted diseases would be foolhardy. An even more foolish mistake would center on denying the need for extensive sex education programs worldwide.

　　武断地无视性乱行为的增多和性传播疾病的迅速蔓延之间的直接联系是鲁莽的。一个更愚蠢的错误是否认在世界范围内开展广泛的性教育项目的必要性。