49. For the majority of people， reading or learning a new skill has become the focus of their lives and the source of their happiness and contentment after their retirement.
50. For people who want to adopt a healthy and meaningful life style， it is important to find time to learn certain new knowledge. Just as an old saying goes： it is never too late to learn.
51. There is a general debate on the campus today over the phenomenon of college or high school students‘ doing a part-time job.
52. By taking a major-related part-job， students can not only improve their academic studies， but gain much experience， experience they will never be able to get from the textbooks.