Terms containing backward operator

Subject	English	Chinese
oil	backward difference operator	后向差分算子
tech.	backward difference operator	向后差分算子
tech.	backward operator	滞后算子
stat.	backward shift operator	后移算子
busin.	backward shift operator	反向移位算子
tech.	backward shift operator	后向移位算子
busin.	backward shifting operator	后向移位算子