Sometimes primary group relationships evolve out of secondary group relationships.

有时主要的群体关系从次要的群体关系演变而来。

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He has taken out one damned storybook thereupon on secondary bookrack.

于是他从书架二层上拿出了一本鬼故事书。

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Eight out of ten youths now finish secondary school.

现在，十个年轻人其中八个完成中学课程。

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Wakeman School in Shrewsbury, which has seen falling pupil numbers, is the only secondary out of nine in the county under threat of closure.

BBC: Petition over Shrewsbury school closure plan

It shows that young people need the skills taught at primary and lower secondary school to find decent jobs.. In sub-Saharan Africa, about 30 million children are still missing out on primary school and 22 million teenagers are out of secondary school, missing out on vital skills for future employment.

UNESCO: One third of young people in Sub-Saharan Africa fail to complete primary school and lack skills for work | United Nations Educational, Scientific and Cultural Organization

In South and West Asia, about 13 million are still missing out on primary school and 31 million teenagers are out of secondary school, missing out on vital skills for future employment.

UNESCO: Over one quarter of young people in South and West Asia fail to complete primary school and lack skills for work | United Nations Educational, Scientific and Cultural Organization