分层用英语短语怎么说

To divide into layers or to stratify is to "layer" something. You can also say that something is "stratified" or "layered." For example:

The sedimentary rock was stratified into layers of sandstone, shale, and limestone.
The soil in the garden was layered with compost and fertilizers to prepare it for planting.
The company's organizational structure is layered, with multiple levels of management and supervision.