如果我们遮住底边角上的树丛，这张照片会给人以更好的平衡感。 If we mask out those bushes in the bottom corner, the photograph will have a better balance.
顶垂线，高线从一个几何形体的底边到相对的顶点、平行边或平行面的垂直距离 The perpendicular distance from the base of a geometric figure to the opposite vertex, parallel side, or parallel surface.
