数据库 数据库理论 释文 external schema 外模式 数据库 数据库理论 释文 external schema 外模式
- biodegradation
- biodegradation of pollutants
- biodegradation of polymer
- biodegradation of surfactant
- biodemography
- bio-deodorization during composting
- biodeposition
- BIODEPTH
- biodetection
- biodeteriorative microbiology
- biodetoxification
- biodiagenesis
- bio-diesel
- biodiesel
- biodiesel prepared by emulsification
- biodiesel prepared by transesterification
- biodiesel technology
- biodiversity
- Biodiversity and Ecological Processes in Terrestrial Herbaceous Ecosystems
- biodiversity and ecosystem functioning experiment：BEF experiment
- biodiversity conservation
- bio-diversity conservation in China
- biodiversity decline in China
- Biodiversity Heritage Library
- biodiversity hotspots