在自然界,多数植物都是圆形。这是自然选择的结果,因为数学家告诉我们,圆形物体耗材最省而容积最大。然而也有少数植物生就一副方形模样。在我国贵州省的桐梓县盛产方竹,这些竹子截面都呈四方形,当然不是标准的正方形,棱角较圆滑,竿下方而上圆,是世界著名观赏竹种。 In nature, most plants are round. This is the result of natural selection, because mathematicians tell us that the circular objects are the most economical and have the largest volume. However, a few plants give birth to a square shape. In our province, Tongzi County, Guizhou Province is rich in square bamboo, the bamboo cross-section was a square, of course, is not a standard square, more rounded corners, round the bottom of the pole, is the world famous ornamental bamboo species.