3、 There is a public / general / much debate / discussion / controversy today / nowadays on / about / over / as to the problem / issue of....

Those who criticize / oppose / object to / contend / argue ... that....

They believe that ....

But people who advocate / favor ..., on the other hand, maintain / assert that....

3.1 There is much discussion today about whether fast economic growth is desirable. Those who criticize economic growth argue that we must slow down. They believe that society is approaching certain limits on growth. These include the fixed supply of natural resources, and the possible negative effects of industry on the natural environment. People who want more economic growth, on the other hand, argue that even at the present growth rate, there are still many poor people, They maintain that only continued growth can create the capital needed to improve the quality of life and provide the financial resources required to protect our natural surroundings from industrialization.

现在围绕快速的经济发展是否应该正展开一场热烈的讨论。那些持反对意见者认为我们必须放慢发展速度。他们说发展已接近某种极限！这其中包括有限的自然资源供应和工业对环境造成的消极影响。然而要求更快发展的人则认为，即使按目前的发展速度还是有许多穷人。他们认为经济的持续快速发展才能创造提高生活质量所必需的资本，才能提供用来保护环境不受工业化破坏的资金。

3.2 There is a general debate on the campus today over the phenomenon of college students' doing a part-time job. Those who object to it argue that students should not spend their precious time in this way. But people who advocate it, on the other hand, claim that, by taking a major-related part-time job or summer job, students can not only improve their academic studies, but gain much experience, experience they will never be able to get from the textbooks.

关于大学生打工这一现象，校园里正展开一场讨论。反对大学生打工的人指出大学生不应该把宝贵的时间花在这上面。然而赞成者则认为，通过从事一些与专业有关的工作，可以提高学生的学习，还可获得到书本上得不到的许多经验。