Pic Title: 井底之蛙 Related Idiom: Frog Related pictures: 井底之蛙 Source: http://www.zbedu.net/ Pic Description: 　　Innovative research of primary and secondary IT education: teaching Introduction - a frog to see the world of primary and secondary education IT Innovation Research: textbook Introduction - a frog to see the world Translated by Google No. / 2 Picture

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