When one part is largely developed, perhaps it tends to draw nourishment from the adjoining parts; and every part of the structure which can be saved without detriment will be saved.

当一个部分得到很大发展时，它可能倾向于从相邻部分吸取营养；并且结构的每个可以保存而不会造成损害的部分都将被保存。