70年代以前,人们是通过黑白照片来记录生活轨迹,翻阅着黑白影集来回顾过去,一张照片或许代表着一段温馨的记忆,一段刻骨铭心的情感,一段纯洁无瑕的友谊……随着生活水平的提高和科学技术的发展,黑白照片开始被彩色照片所代替,在通过照片回顾过去时有了丰富的色彩,摄像机的日见普及使人们记录生活轨迹的方式从静止到了动态, Before the 1970s, people used black-and-white photos to record their life trajectories and read through black and white albums to review the past. A photo may represent a warm memory, an unforgettable emotion, a pure and innocent friendship... With the standard of living Improvements and the development of science and technology, black-and-white photographs have begun to be replaced by color photographs, and in the retrospect of the past through the photographs have been richly colored, and the popularity of cameras has enabled people to record the life trajectory from static to dynamic.