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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At the initial operation stage after the quality system is established.

质量体系建立后的运转初期。

youdao

This was revised with another dynamic hip screw 2 weeks after initial operation.

初次手术2周后患者接受了翻修手术。

youdao

Initial operation under this approval will be limited to Wilmington, NC and the surrounding area and will expand nationwide pending completion and activation of the Commission's facilities for processing requests for protection of unlicensed wireless microphone at event venues.

ENGADGET: FCC approves first white space device and database for Wilmington, NC

She said after the initial transplant operation, a further CT scan returned abnormal results and so another operation was carried out.

BBC: Addenbrooke's Hospital

The initial transplant operation was successful, but he contracted MRSA following surgery, and died after two further operations to clean up wounds.

BBC: Hospital slated over transplant deaths