童鹤龄教授不幸逝世了。每当念及他在天津大学建筑系时所作出的贡献，痛惜之情便油然而生。还在几个月前，我们忽然接到他的来信，得知他的近著《建筑渲染——理论·技法·作品》已经出版，自然是分外高兴。但信中的字里行间也流露出身体欠佳和心境的孤寂，又令人牵挂。五... Professor Tong Heling unfortunately passed away. Whenever he talked about his contribution to the architecture department of Tianjin University, he felt a pity. Just a few months ago, we suddenly received a letter from him and learned that his recent book, Architectural Rendering - Theoretical Techniques and Works, has been published. Naturally, it is extremely delightful. However, the letters in the lines between the lines also revealed the poor health and mood of loneliness, but also worry about. Fives...