australia.gov.au 7.69 million square kilometers 7.69 million square kilometers very big country 7.69 million square kilometers "The Australian continent" 澳大利亚地理 "The Australian continent" 7.69 million square kilometers 7.69 million square kilometers 7.7mill km2 "The Australian continent" 7.7mill km2 7.69 million square kilometers driest (not including Antarctica), flattest of any continent "The Australian continent" "The Australian continent" spacious and wider, "The Australian continent" "The Australian continent" apart from the bed? "The Australian continent" 7.7mill km2 "The Australian continent" 7.7mill km2 Australian Government "The Australian continent" 7.7mill km2