从1979年到2009年，25 - 29岁年龄段拥有四年大学文凭的比例仅仅从23.1%升到了30.6%，或者说每四年才大约升高1个百分点。
From 1979 to 2009, the percentage of people ages 25 to 29 with a four-year college degree rose from 23.1 percent to 30.6 percent-or roughly 1 percentage point every four years.
很长一段时间。大学文凭是获得好工作的敲门砖。但由于近十年来经济的大衰退打破了很多美国大学生的美梦。
A college diploma has long been the ticket to a good job, but the deepest economic slump in decades has dampened the dreams of many U. s. college seniors.
大学文凭在很长一段时期被认为是得到一份好工作的入场券，但是几十年以来最严重的经济衰退使很多美国大学毕业生的梦想破灭。
A college diploma has long been the ticket to a good job, but the deepest economic slump in decades has dampened the dreams of many U. s. college seniors.
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