1)proportional reduction,比例缩减2)retraction proportion,缩减比例3)scale-down,按比例缩减4)To reduce in scale;scale down.,按比例缩减;减少5)scale down,缩小比例，按比例减小6)scale-down factor,比例缩减因子
用法例句
In order to make the constraint algorithm more efficient,the processing of constraint propagation is analysed,and parameterized description of the arc consistency propagation depth is represented by using variable domain retraction proportion.
