three belts的用法和樣例：
例句
- But the three zones mingle and amalgamate along the edges, like the colors in the solar spectrum.
然而，這三帶的各自邊緣又相互混合，相互滲透，就像太陽光譜的各種顏色那樣。 - The edifices which belong exclusively to any one of these three layers are perfectly distinct, uniform, and complete.
分別各屬於這三帶之任何一帶的建築物，都各自是界限清楚的，統一的，完整的。
