variable pole变磁极性variableadj.可变的；易变的n.变量；易变的东西Variable-structure backstepping变结构反演variable structure control theory变结构控制理论variable-density record section变密度记录剖面variable - step gain adjustment变步长增益调整variable number of tendem repeats数目可变的顺向重复variable frequency variable speed变频调速variable-capacitance parametron变电容参变管variable length packets switching变长分组交换variable-mu pressure transducer变导磁系数压力转换器variable weight combination model变权组合