The narrow passages are roughly hewn in the rock .
狭窄的走道是在岩石上草草凿出来的。
Flying over denver recently , I found myself transfixed by the carved and sculpted landscapes , the bald deserts and red river canyons , the mountains hewn by ancient dust storms .
Little by little a machine is " printing " a complex titanium landing-gear bracket , about the size of a shoe , which normally would have to be laboriously hewn from a solid block of metal .
