工学 航空电子系统确认及验证 释 line replaceable unit; LRU 外场可更换单元 从结构、功能或电气上，把飞行器零部件、系统或设备划分成若干在外场级维修中可以拆卸或更换的独立单元。
计算机体系结构 存储系统 释文 least recently used, LRU 最近最少使用
- Betti number
- Betti number and torsion number
- Betti reciprocal theorem
- Betty Loh Ti
- Betty's Hope Museum
- Betula Deciduous Broadleaf Forest
- Betula ermanii Deciduous Broadleaf Forest
- betulic acid
- betulin
- betulinic acid
- betweenanene
- betweencenters
- Between Facts and Norms
- Between Friends
- between-group correlation
- between-group dispersion matrix
- between-group sum of squares
- between-group variance
- betweenness
- betweenness group
- betweenness relation
- betweenness semigroup
- between relation
- between-subjects design
- Between the Acts