他那个时候并不知道，半自动地面防空警备系统是冷战时期美国空中防御系统的重要组成部分，但它依然给他留下了深刻的印象。
He didn't realise at the time that SAGE formed an important part of America's air defence systems during the Cold War but it still made an impression.
一个巨大的计算机化的防空系统，SAGE (Semi - Automatic Ground Environment半自动地面防空警备系统)旨在帮助空军实时跟踪雷达数据。
A gigantic computerized air defense system, SAGE (Semi-Automatic Ground Environment) was designed to help the air Force track radar data in real time.
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