GCD ߡߊ߬ߛߘߎߡߊ߲߫ ߓߍ߲߬ߓߊߟߌ ߦߙߌߞߊ߫ ߛߎ߲ߞߎߡߊ߫ ߝߌ߬ߟߊ߫ ߛߐ߬ߘߐ߲߬ߠߌ߲ ߞߊ߬ ߝߘߏ߬ߓߊ߬ ߕߟߊߟߌ ߖߊ߬ߕߋ߬ߓߐ ߞߍ߫߸ ߏ߬ ߕߎ߬ߡߊ GCD ߟߋ߬ ߝߘߏ߬ߓߊ߬ ߕߟߊߟߌ ߓߍ߯ ߘߐ߫ ߓߟߋ߬ߓߟߋ ߘߌ߫.