brownfield [ˈbraʊnˌfild]

例句:

• Redeveloping brownfield land was an initiative of the former Labour Government.
  来自THETIMES
• By 2005 he wants half of all new houses to be built on previously developed land: so-called brownfield sites.
  到2005年，他希望会有一半的新房子建在以前曾经开发过的所谓棕色地带上。
  
• Wild cities Patches of bare ground that heat up in the sun also produce "little microclimates" on brownfield sites.
  来自BBC
• "The purpose of today's meeting, more than any other, is - simply stated - how to save lives," said Brownfield.
  来自VOA