数据库 数据库新技术 释文 inverse document frequency, IDF 反文档频率
- protogalaxy
- protogene
- protogenesis
- protogenic solvent
- protogeny
- proto-globular cluster
- protogyny
- proto-industrialization
- proto-Jupiter
- proto-language
- proto-lexeme
- protoloph
- protolyte
- protomer
- protomerite
- protomite
- proto model
- protomonomyaria stage
- protomont
- protomylonite
- Proton
- proton
- proton affinity
- protonated ligand
- protonated molecule