题目关键字
keyword in title
题目外关键字
keyword out of title
推导关键字
derived key
外来关键字
foreign key
替换
displace; replace; shift; substitution; swap; switchover; take the place of
replace
替换表
substitution list
替换材料
alternate material
替换操作
substitution operation
替换成本
alternative costs
替换串
replacement string
替换错误
replacement error
替换的
substitutional
替换的代表
alternative delegate
替换电路
replacement circuit
替换方案
alternate design
替换规则
replacement rule
替换恢复
alternate recovery
替换零件
replacement parts
替换论
replacement theory
替换冗余
replacement redundancy