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
- characteristic operator function
- characteristic parameter
- characteristic parameter of antenna
- characteristic piece
- characteristic plane
- characteristic p-method
- characteristic point
- characteristic polynomial
- characteristic polynomial of a graph
- characteristic polynomial of a matrix
- characteristic quadratic form
- characteristic radius
- characteristic ray
- characteristic ray cone
- characteristic ring
- characteristic root
- characteristics
- characteristics and evaiuation of industrial catalyst
- characteristics and patterns of urban spatial structure in China
- characteristic section of stage
- characteristic sensitivity
- characteristic sequence
- characteristic series
- characteristic set
- characteristic singularity