于洪武同志办学思想的启示
Inspirations of YU Hong-wu 's Ideas of Running Schools
平胸鸟目之一；鸵鸟及与其有关的现已灭绝的鸟类；生活于洪积世以前。
A ratite bird order : ostriches and related extinct birds ; known from the Pleistocene onward .
于洪