layer of a distributed winding

例句：

1. 1. Thecity is divided into several layers of government.
   这个城市被分为几个层级的政府。
2. 2.The layer of soil beneath the surface is rich in minerals.
   地表下土壤层的矿物质含量丰富。
3. 3. The architect designed a layered structure for the building.
   建筑师为这座建筑设计了一个多层次的结构。