《李白传》是著名文学史家李长之先生的《道教徒的诗人李白及其痛苦》和《李白》两书的合集。这部合传，以开阔的视野勾画了盛唐浪漫主义诗人李白的一生，以细腻的笔触描摹了李白自由不羁的精神轨迹。既有史学家的严谨，又有文学家的才情，深入浅出，带你走进盛唐的斑斓世相和李白的内心世界。

Few scientists are as recognizable as Stephen Hawking. Despite havingAmyotrophic Lateral Sclerosis （Lou Gehrig's disease）--an affliction thatmany experts expected to have killed him decades ago Hawking remainsa vital and influential voice in the scientific munity. One of the leadingcosmologists studying the celestial phenomenon known alack holes,Hawking has also led the way in popularizing science with hiest-sellingwork A Brier'History of Time. Thiiography of Hawking, written by aphysicist, provides an accessible introduction to the life and work of aninspirational figure. Stephen Hawking." A Biography provides an overview of the life and workof thirilliant scientist that can be read and appreciated by students andlay people alike. The author examines many aspects of his fascinating career: · Hawking's childhood and early education, and the shocking diagnosisof his disease: · His early scientific work on black holes that cemented his reputationas a scientist; · How Hawking managed to remain a p

在中国，雷达技术研究开始于1940年代，发展于1950年代，经历了从小到大，从维修、仿制到自行研制的发展历程，走出了一条“自力更生，艰苦奋斗，勇攀高峰，开拓创业”的发展道路，张直中先生是整个中国雷达事业发展历程的开拓者和见证人。 他主持研制成功我国部对空警戒雷达，并投入批量生产： 他参与制定十二年远景规划，分工负责编写雷达科技发辰规划； 他研究动目标显示技术，成果被应用于多种雷达；他年过八十时还参与863逆合成孔径成像雷达研究。魂萦梦绕，荣辱与共，无怨无悔，心满意足，是为其雷达人生!