The Government has ruled out the building of a new airport on a greenfield site.政府禁止在一块未开发地皮上建设新机场的。There is virtually no greenfield investment.几乎没有对新地皮的开发投资。The Government has ruled out the building of a new airport on a greenfield site.政府已经排除了在未开发的地皮上建设新机场的可能性。