variableareaadj.可变截面的variableadj.可变的；易变的n.变量；易变的东西variable cost law变动成本法variable delaying变时滞variable resistor可变电阻器Variable centroid变质心variable behavior[医] 可变性活动variable of state状态变数variable function可变函数variable indcutor可变电感器variable- pitch变螺距variable boundary动边界