尽管约1/3的美国成年人拥有四年制大学本科学位 — — 这一比例在有史以来已经高居榜首 — — 但同样比例的美国人学位仅仅停留在高中。
Though around one-third of US adults have a four-year college degree – the highest proportion on record – an equal share has no more than a high-school diploma.