Why should the sepals, petals, stamens, and pistils, in each flower, though fitted for such distinct purposes, be all constructed on the same pattern?

为什么每朵花的萼片、花瓣、雄， 尽管用途如此不， 却都按照相的模式建造？

It is a very beautiful species, the large oval lip white, delicately veined with purple; the other petals and the sepals purple, strap-shaped, and elegantly curled and twisted.

这是一个丽的物种，椭圆形的大唇白色，精致的紫色脉络；其他花瓣萼片紫色，带状，优雅地卷曲扭曲。