But the three zones mingle and amalgamate along the edges, like the colors in the solar spectrum. 然而，这三带的各自边缘又相互混合，相互渗透，就像太阳光谱的各种颜色那样。
The edifices which belong exclusively to any one of these three layers are perfectly distinct, uniform, and complete. 分别各属于这三带之任何一带的建筑物，都各自是界限清楚的，统一的，完整的。
