distance distinct vision释义明视距离
distance of audible vision明视距离
distance of distinct vision[光] 明视距离;糜距离;明视距离
distance vision examination远视力检查法
long distance vision远距离视觉
distance ofaost distinct vision明视距离
least distance of ditnice vision最小明视距离
least distance of distinct vision最小明视距离;[光] 明视最短距离;明视距离
vision distance可见距离;能见度;视野距离;明视距离