18.Working with the disabled cannot help but leave one impressed with their indefatigable desire .

与残疾人一起工作使一个人不得不对他们坚持不懈的渴望印象深刻。

19.Perhaps no issues are more controversial than euthanasia and abortion , both of which involve taking the life of a human being .

也许没有问题比安乐死和人工流产更有争议性，它们都涉及结束一个人的生命。

20.Never before in history has the issue of overpopulation been more evident than now .

历史上，人口过剩的问题从来没有比现在更加突出。

21.Perhaps it is time to reexamine the idea that college degrees are a guarantee of intelligence .

也许现在是应该重新考虑大学为是智力的保证这种想法的时候了。

22.A growing number of people are beginning to realize that wealth is not the sole prerequisite for happiness .

越来越多的人开始意识到财富不是幸福的惟一先决条件。

23.In spite of the extraordinary progress made in science and technology , problems remain in terms of guaranteeing that achievements benefit the greatest number of people .

尽管科学技术取得了非凡的进步，但是在保证进步成果使尽可能多的人受益这方面还存在一些问题。

24.A famous thinker once wrote that " the greatest threat to mankind is mankind itself ! " If this is indeed the case , then the current situation should make us ponder our futuer existence .

一位著名的思想家曾经写道：“对人类最大的威胁是人类自身！”如果事实确实如此，那么，现状应该促使我们对我们未来的生存进行思索了。

25.U.S. President Harry Truman once remarked : " The buck stops here ! " His view has been confirmed by numerous world leaders who have assumed full responsibility for their actions .

美国总统杜鲁门曾经说过：“责任止于此！”（意为勿再把责任往别处推，这是杜鲁门办公室桌上的座右铭）他的观点得到了很多对自己的行动承担完全责任的世界领袖的肯定。

26.Large families were once seen as a blessing . Today , however , things are changing and an increasing number of Chinese parents realize that fewer is better .

大家庭曾经被看做是一种福气。然而，今天，情况改变了，越来越多的中国家长意识到家庭成员越少越好。

27.People used to place total reliance on the government . The so-called " iron rice bowl " prevailed in the past , but things are quite different today .

过去，人们习惯完全依靠政府。以前盛行所谓的“铁饭碗”，但今天的情况有很大的不同。