The senior high school period is a very special period for middle school students to be mature in mentality and is also an important period for them to form personality traits.

高中阶段是中学生在心理上由未成熟走向成熟的特殊时期，也是人格特征形成的关键时期。

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Those in the middle have seen their real incomes fall over the same period, precipitously so in the case of those with only high school qualifications.

处于中间阶层的人同期内实际收入有所下降，而在那些只有高中文凭的人当中，这一趋势尤为明显。

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In the year that the new high school schedule was implemented for the schools involved in the above study, teachers found that more of the curriculum was able to be taught in a single period.

在这一年，新高中的时间表被实施在研究里面涉及的学校，老师们发现更多的课程能够在一个单一的时间段里面被教。

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If we want to correct this problem we need to make the period after high school more focused on work and not an unnecessary extension of adolescence.

FORBES: Americans Need More Work And Less College

Starting from a much lower base, the high school dropout rate among whites also declined during that period (from 7% in 2000 to 5% in 2011), but did not fall by as much.

WSJ: Best of the Web Today: The New Nixon

Among adults aged 25-29, the proportion with five years of primary education went from 98.8 percent to 99.2 percent during the period from 1990 to 1997, and the proportion of those with a high school diploma rose from 86 to 87 percent.

UNESCO: II Part Analytic Section