Authorities have tightened security across the country, as well as closed educational institutions until Monday.

VOA: standard.2009.10.24

Now let's think about the implicit purpose of educational institutions.

下面再来探究,教育体系的深层目标。

麻省理工公开课 - 媒体、教育、市场课程节选

Now let's think about the implicit purpose of educational institutions.

下面再来探究,教育体系的深层目标。

麻省理工公开课 - 媒体、教育、市场课程节选