分层服务怎么说英语

Hierarchical service is a way of organizing a system into levels or layers, with each level providing certain services to the level above it. In English, we often use the term "tiered service" to refer to this concept. For example, you might have a tiered system in which the lowest level provides basic services, the middle level provides more specialized services, and the top level provides high-level services such as coordination and management.