网络与数据通信 网络管理与安全 释文 security parameter index, SPI 安全参数索引
- astrography
- astro-gravimetric leveling
- AstroGrid
- Astro-H X-ray astronomy satellite
- astroid
- astroidal ellipsoid
- astroid catacaustic
- astroid evolute
- astroid involute
- astroid pedal curve
- astroid radial curve
- Astroinformatics
- astroinformatics
- astrolabe
- astrolithology
- astrologer
- astrology
- astromagnetism
- astromechanics
- astrometeorology
- astrometer
- astrometric aspect
- astrometric baseline
- astrometric binary
- astrometric catalogue