The development and utilization of urban underground space in a broad sense mean all underground facilities for utilization of urban underground space and execution of city's function.

城市地下空间的开发利用，广义上讲是利用城市地表以下的空间，发挥城市功能的一切地下设施。

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Some examples show that integrated construction of ground with underground can decline the cost of ground construction and enhance the economic benefit of oil field development.

对多个地面与地下建设一体化开发实例的分析表明，地面与地下一体化开发可以有效地降低地面建设成本，提高油田开发的经济效益。

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The urban underground space planning is a guarantee for the urban spatial development.

城市地下空间规划是城市主体化开发的保障。

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The Dvoinoye project is progressing, with 52% of the underground development complete and surface infrastructure 45% finished.

FORBES: Kinross: Main Focus Will Be On Increasing Margin And Prioritizing Cash Flow

Peruvian output rose at Huaron and Morococha as a result of investment the company made in additional underground development over the last 12 months, Burns said.

FORBES: Pan American 3Q Silver Output Lifted By Newly Acquired Dolores Mine; Adjusted Earnings Fall

Artist Luzinterruptus fitted 10, 000 books that had been discarded by public libraries with LED lights and covered the streets of Melbourne with them, and in an exciting development the much-anticipated Low Line underground park in NYC debuted a full-scale model of their incredible fiber-optic solar-concentrating technology in New York City's lower east side.

ENGADGET: Inhabitat's Week in Green: GPS shoes, shape-shifting bicycle and a wheelchair helicopter