variable pad可变衰减器variableadj.可变的；易变的n.变量；易变的东西Variable valve lift可变气门升程variable speed size可变步长variable cam timing可变配气相位定时variable resistanceadj.可变电阻的Variable Tangential可变切线variable-mu valve可变放大系数管variable strabismus变易斜视variable cost ratio变动成本比率variable rough sets变异粗集variable air volume变风量