网络与数据通信 协议体系与组成结构 释文 service data unit, SDU 服务数据单元
- rigorous error limit
- rigorous justification
- rigorous proof
- rigorous solution
- rigorous theorem
- rigs per unity month
- rig substructure
- rig type
- Rig-veda
- Ri Hua Zi's Summary of Materia Medica
- RII
- Riikka Pelo
- Rijksmuseum Amsterdam
- Rikard Nordraak
- RIKEN
- r-K对策连续体
- RILEM
- Riley and Riley's model
- Riley crater
- rill
- rille
- rille crater
- RIM
- Rim
- rim