1、These three forms of activity compose the mental educational activity system together.
三種活動形式共同構(gòu)成心理教育活動體系。

2、Any educational activity has its aim.
任何教育活動都是有目的的。

3、Ancient Greek sophists educational activity has a profound historical background.
古希臘智者的教育活動有深刻的歷史背景。