及物动词正，术（使）分层，成层

1. 成层：stratification 成层法 | stratify 成层 | stratigrapher 地层学家

2. 分层：stratiformis 层状云 | stratify 分层 | strato 层的意思

3. 使层化：stratum单数形式 | stratify使层化 | strip脱衣v

4. (使)成层：stratiformis /成层状云/ | stratify /(使)成层/ | stratigracy /军人专政/

verb

1. render fertile and preserve by placing between layers of earth or sand

e.g. stratify seeds

2. form layers or strata

e.g. The rock stratifies

3. form, arrange, or deposit in layers

e.g. The fish are stratified in barrels
The rock was stratified by the force of the water
A statistician stratifies the list of names according to the addresses

4. divide society into social classes or castes

e.g. Income distribution often stratifies a society

5. develop different social levels, classes, or castes

e.g. Society stratifies when the income gap widens