工学 食品安全 释 food safety objective；FSO 食品安全目标 食品中的某种危害可提供或促进适当保护水平（appropriate level of protection，ALOP）的最大允许频率或浓度。食品安全目标的概念仅限于食品安全，不涉及质量。
网络与数据通信 无线网络 释文 free space optics, FSO 自由空间光束
- spectral responsivity
- spectral rigidity
- spectral ring
- spectral scale
- spectral selectivity
- spectral semi-invariant
- spectral sensitivity
- spectral sensitometry
- spectral sequence
- spectral sequence of a fiber space
- spectral series
- spectral set
- spectral shift
- spectral singularity
- spectral solvent shift
- spectral space
- spectral splitting
- spectral subspace
- spectral synthesis
- spectral synthesis modeling
- spectral system
- spectral term
- spectral test
- spectral theorem
- spectral theory