数据库 数据库管理系统及其实现技术 释文 multilevel recovery 多层恢复
- unauthorized agency
- unavailability
- unavoidability
- unavoidable
- unavoidable ion
- unavoidable set
- unbacked film
- unbaffled throughput
- unbalance
- unbalanced
- unbalanced assignment problem
- unbalanced centrifugal force
- unbalanced development
- unbalanced growth theory
- unbalanced moment
- unbalancedness
- unbalanced operation of hydro-generator unit
- unbalanced transportation problem
- unbalance response
- unballast
- unballasted pumping speed
- unbased mapping
- unbated
- unbiased
- unbiased confidence estimation