Population density is among the lowest in the world, with an average of 2.5 people per square kilometre –no-one’s within cooee (shouting distance) in the outback. studyinaustralia.gov.au 人口密度居世界最低之列,平均每 平方 公里2.5 人—— 在人烟稀少的内地,在呼喊距离(叫一声就能听到的地...