扭转不好的社会趋势远非一件易事，看法需要有巨大的变化。对正误的深刻认识是判定得体的社会行为所必需的。

　　55. We owe a debt of gratitude to the many individuals who dedicated their lives to making the world a better place . However , we must not rest on their accomplishments , but must instead work assiduously to record even greater achievements .

　　我们应该感谢许多为把世界变得更美好而奉献一生的人。然而，我们不能依靠他们的成绩，而必须努力工作，取得更辉煌的成就。

　　56. The two major challenges facing China today center on maintaining sustained economic growth and feeding its growing population of over 1.2 billion people with only seven percent of the world's cultivable land . Despite the monumental difficulties involved , Chinese people will undoubtedly exhibit their indefatigable resilience and achieve great success in both regards . 现在，中国面临的两大挑战是保持持续的经济增长和靠世界上仅仅百分之七的可耕地养活仍在增长的12亿人口。尽管遇到的困难很大，中国人无疑会表现出不知疲倦的活力，在两方面都取得巨大成功。

　　57. We do , in fact , have a long way to go to reach our final goal , but achieving some remains well within the realm of possibility .

　　事实上，我们达到最终的目标还有很长的路要走，但是，取得一些成绩还是可能做到的。

　　58. The time is right for us to take full advantage of ample existing opportunities .

　　这正是我们充分利用大量现有机会的时候。

　　59. While it remains to be seen whether or not environmental deterioration can be controlled , the current prospects are far from encouraging . People around the world must act immediately to prevent the situation from deteriorating even further . 环境恶化是否能得到控制这个问题仍然没有答案，但目前的前景一点儿也不乐观。全世界的人必须立即行动，防止情况进一步恶化。