应该采取适当的措施限制外国旅游者的数量，努力保护当地环境和历史不受国际旅游业的不利影响。
　　Proper measures must be taken to limit the number of foreign tourists and the great efforts should be made to protect local environment and history from the harmful effects of international tourism.
　　
　　越来越多的人开始意识到财富不是幸福的惟一先决条件。
　　A growing number of people are beginning to realize that wealth is not the sole prerequisite for happiness .
　　
　　无可否认，空气污染是一个极其严重的问题：城市当局应该采取有力措施来解决它。
　　There is no denying the fact that air pollution is an extremely serious problem: the city authorities should take strong measures to deal with it.
　　
　　通货膨胀又是一个我们必须学会面对的痛苦的新情况。
　　Inflation is yet another new and bitter truth we must learn to face .
　　
　　既然世界上许多国家仍被饥饿和贫困所困扰，为什么有的政府还坚持花费数十亿美元用于太空探索?现在越来越多的人提出这个问题。
　　Why do some governments persist in spending billions of dollars on space exploration when starvation and poverty continue to grip many countries throughout the world? This particular question is being raised by an ever increasing number of people.
　　
　　说到教育，大部分人认为其是一个终生的学习。
　　When it comes to education, the majority of people believe that education is a lifetime study.
　　
　　越来越多的人开始意识到教育不能随着毕业而结束。
　　An increasing number of people are beginning to realize that education is not complete with graduation.
　　
　　城区的迅速扩大在很多情况下侵占了宝贵的可耕地，使人们普遍认识到发展不能以牺牲农业为代价。政府更加重视这个问题，越来越多的不必要的工程被终止。
　　The rapid expansion of urban areas has in many cases encroached on valuable cultivatable land , and led to a general recognition that development must not be carried at the cost of agriculture . The government has attached greater importance to the problem and an increasing number of redundant projects are being terminated .
　　
　　世界上越来越多的人认识到加强环境保护的必要性。
　　There is a growing worldwide awareness of the need for strengthened environmental protection.
　　
　　许多专家指出体育锻炼直接有助于身体健康。
　　Many experts point out that physical exercise contributes directly to a person's physical fitness.