The Fibonacci sequence appears in nature more frequently than one might expect; the branching of trees, arrangement of leaves on a stem, the fruitlets of a pineapple, even the spiral galaxies all exhibit Fibonacci patterns.
斐波那契数列在自然界中出现的频率比人们想象的要高；树木的分枝、茎上叶子的排列、菠萝的果实、甚至螺旋星系都呈现出斐波那契模式。
