信息安全 信息系统安全防护技术 释文 physical security 物理安全
- orange-spotted spinefoot
- Orange Walk
- orange wheat blossom midge
- Orango Islands National Park
- orangutan
- Oraon
- oratorio
- Oratory
- Orazio Vecchi
- ORB
- orb
- orbicularis
- orbicule
- orbifold
- orbifold compactification
- orbifold notation
- orbifold theorem
- orbiform curve
- Orbis Sensualium Pictus
- orbit
- orbital
- orbital acceleration
- orbital angular momentum
- orbital angular momentum of light
- orbital angular momentum operator