自从读了朱自清的那篇名作以后,我就觉得“背影”是一个美好而令人伤感的隐喻。在依依不舍地送别亲人和朋友的时候,我们看到的总是背影。不久前,我专程赶到天津给恩师杨生茂教授送行,眼前浮现的也是一个渐渐远去的背影。这是一个时代的背影,或者更准确地说,是南开史学的“巨人 Since I read Zhu Zhisqing’s masterpiece, I think “back shadow” is a beautiful and sad metaphor. When reluctantly bidding relatives and friends, we have always seen the back. Not long ago, I made a special trip to Tianjin to give my teacher, Professor Yang Shengmao, and the sight that came to my eyes was also a distant figure. This is the back of an era, or more accurately, the “giants” of Nankai’s history