- 不: a block of wood
- 分层: lamination; layering; strati ...
- 的: 4次方是 The fourth power of 2 i ...
- 不分层的, 乱砌的: uncoursed
- 分层的: demixing; hierarchical; hypsometric; lamellated; laminarized; layered; storied; straticulate; stratified; stratiform
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