1943年1月,北京严冬的朔风正施展着淫威,所有的水面都已经成了冰的世界,那是孩子们最恣意的游乐场所。这时,在南小街新鲜胡同的一个小院子里,诞生了一个新的生命。也许,当时有人会想到,北京的什剎海、后海的冰场上将增添一个嬉戏的顽童,但却不一定有人能预见到,这个孩子会成为在世界上开创一个新的研究领域的科学家。他叫张沅。命运,跟他开了一个小小的玩笑;命运,又似乎是特别垂青于他 In January 1943, the winter winds of Beijing were exerting their despotic power. All the water has become a world of ice, and it is the most unforgettable playground for children. At this moment, a new life was born in a small yard of fresh alley in South Street. Perhaps, at the time, someone would have thought that a playful urchin would be added to Shichahai and Houhai ice rinks in Beijing but not necessarily foreseeable that the child would become a scientist in a new field of research in the world. His name is Zhang Yuan. Fate, with him a little joke; fate, but also seems to be particularly favored him