Expected to begin initial operation in 2015, the system will replace the existing Air Force Space Surveillance system, or VHF Fence, which has been in service since the early 1960s.

预计该系统将于2015年投入首次运行，届时将替代美国空军的现有太空监视系统或‘甚高频篱笆’——自从20世纪60年代初期就开始服役。

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Under the eight-year contract, Lockheed Martin will help develop long-range strategic plans and provide support for the operation and management of Air Force personnel IT systems.

根据这份8年合同，洛·马公司将帮助开发长期战略，并为空军人力IT系统的运作和管理提供帮助。

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This paper analyzed the energy consumption of a system in operation status——the double U-tubes vertically buried tube ground-source heat pump system in an air force station of Chongqing.

基于重庆市某空军场站的双U管竖埋式土壤源热泵系统工程，对该系统冬季变工况下的运行能耗进行了分析。

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And on Thursday, his casket was wrapped in an American flag as it was transported off a military plane onto the tarmac of Dover Air Force Base in Delaware, according to the U.S. Air Force Mortuary Affairs Operation.

CNN: STORY HIGHLIGHTS

He confirmed that the French air force was involved in the operation, but gave no details.

BBC: France confirms Mali military intervention

The entire operation was part of Air Force Special Operations Command, but recently moved under the umbrella of Air Combat Command.

CNN: Quade: Secretive military team allows reporter inside