网络与数据通信 网络互联 释文 IPv6 routing protocol for low-power and lossy networks, RPL 用于低功耗易丢失网络的IPv6路由协议
- umbilical cord blood
- umbilical cord blood transplantation
- umbilicali artery
- umbilical point
- umbilical sore
- umbilic catastrophe
- umbilic direction
- umbilic line
- umbilic point
- umbilicus
- umbra
- umbra and penumbra of the sunspot
- umbral
- umbral algebra
- umbral calculus
- umbral dot
- umbral eclipse
- umbral flash
- umbral index
- umbral notation
- umbral operator
- umbral shift
- umbrella
- umbrella anchor winch
- umbrella clause