民主不是旁观者的运动。它需要积极参与和对社会正义的承诺。
一个社会文化系统的行为基础设施是其上层建筑的主要原因。
制造工艺的每一个纳米进步,背后都是无数工程师的心血。
I have come to believe that a great teacher is a great artist and that there are as few as there are any other great artists. Teaching might even be the greatest of the arts since the medium is the human mind and spirit.