stratified mixed stand

例句：

1. 1. The soil is stratified with layers of different minerals.
   土壤分层，含有不同矿物质的层次。
2. 2. The city's infrastructure is stratified, with some areas being more developed than others.
   城市的基础设施分层，有些区域比其他地区发展得更好。
3. 3. The architecture is stratified, with each floor having its own set of rooms and amenities.
   建筑分层，每一层都有其自己的房间和便利设施。