red.out
n.（名词）A sudden reddening of the visual field accompanied by severe headache and caused by engorgement of the blood vessels of the head when a person is subjected to a negative force of gravity, as in stunt flying.红视：发生于人受到与地球重力相反的力的作用时，伴有强烈的头痛和由头部血管扩大引起的视觉突然变红，如在特技飞行中
