According to the basic theories of the system science, the paper discusses the significance and functions of readers' information feedback in the dissemination of information of sci-tech periodicals.
依据系统科学基础理论探讨科技期刊信息传播中读者信息反馈的重要意义及其作用。
Radar system is a hi-tech system which concentrates many kinds of modern electronic science and technology achievements.
雷达是集中了现代电子科学技术各种成就的高科技系统。
Radar system is a hi-tech system which concentrates many kinds of modern electronic science and technology achievements.
雷达是集中了现代电子科学技术各种成就的高科技系统。
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