In 2003, researchers at the UJI launched a prospective longitudinal study with a sample of about 500 teenagers from the secondary school.

2003年，海梅一世大学的研究者对五百名中学生进行了一项纵向预期性研究。

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Listing 2 is a sample migration path for a simple concept, with multiple secondary headings.

清单2是简单概念的迁移路径，包含多个二级标题。

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The second is using a secondary electron detector that could function in this non vacuum sample environment.

二是使用了一个在样品室非真空环境下仍然能起作用的二次电子探头。

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The new report is due to be carried out over the coming months by Ofsted inspectors visiting a sample of more than 50 secondary schools, looking at statistics on gifted and talented provision and pupil progression, according to Sir Michael.

BBC: Ofsted chief voices fears for brightest pupils