Complex sentence: While many falls have greater height, few have the combination of height and water volume, and the falls are among the most powerful waterfalls in the world with an average flow rate of 663 cubic metres per second (23,400 cubic feet per second).
Split into simpler sentences: While many falls have greater height, few have the combination of height and water volume. Its distinction lies in the unique combination of great height and large volume, averaging 663 cubic metres per second (23,400 cubic feet per second).