backward and forward
= backwards and forwards [见 backwards]
backward attribute
[计] 反向属性
backward busying signal
[计] 回程占线信号
backward caries
[医] 逆行性龋
backward chaining
[计] 反向链接
backward channel
[计] 反向信道
backward classes
落后阶级, 落后种姓（印度各省当局建议在教育和就业方面给予优惠）
backward compatibility
向后兼容[计] 向后兼容
backward compatible
[计] 向前兼容
backward conditional probabilities
[计] 后向条件概率
backward counter
[计] 减法计数器, 反向计数器
backward curvature
[医] [脊柱]后弯, 脊柱前凸
backward deduction system
[计] 后向演绎系统
backward diagonal
[计] 后向对角线
backward difference
[计] 后向差分
backward difference method
[计] 后向差分法
backward difference operator
[计] 后向差分算子
backward differentiation method
backward differentition method
backward diode
[计] 反向二极管
