理学 系 释 system 系 级别小于界，大于统的年代地层单位。
热学、统计物理学 统计物理学 system 系[统]
corollary 系†，推论；推论的 porism 系；推论；不定设题
数据库 数据库理论 释文 set 系
- Bacillus cereus infection
- Bacillus subtilis genome
- Bacillus subtillis
- Bacillus thuringiensis gene
- bacitracin
- back
- back analysis in rock mass mechanics
- back analysis of hydraulic structures
- back and forth construction
- back-and-forth construction
- back-arc basin
- backbending
- backbiting reaction
- backbiting transfer
- back blade
- back bonding
- backbonding
- backbone
- backbone network
- backbone of percolation cluster
- back-break thrust sequence
- back-carrying manipulation
- backcloth
- back corona
- back cover