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
- exsimilicenter
- ex-situ bioremediation technology
- ex situ conservation
- exsitu conservation of fishery organisms
- ex situ conservation of plant
- exsitu microbial remediation
- ex situ porotection of Chinese materia medica resou-rces
- ex-situ remediation
- ex-situ remediation of groundwater
- exsolution
- exsolution texture
- exsomatize
- ex-space
- exsphere
- exsuccation
- exsudation
- ex-supernova
- EXSY
- extangent
- extangents circle
- extangents triangle
- Extant Scores of Kunqu Opera in Qing Dynasty
- extar
- extein
- extenal auditory canal