The number of petals on a flower is typically a Fibonacci number, or the number of spirals on a sunflower or a pineapple tends to be a Fibonacci number as well.
一朵花的花瓣数量 一般是一个斐波纳契数, 向日葵的螺旋, 菠萝表面的凸起, 也都对应着某个斐波纳契数.