The number of seeds in a sunflower, the petals of any flower, the arrangement of pine cones, the growth of a nautilus shell, etc...all follow the same pattern of these series.

• 以一颗向日葵里的种子数目，任何花的花瓣，松树球果的排列，鹦鹉螺壳的生长等等...都遵照这些级数的同样模式。