variable BHF'生产性的人variableadj.可变的；易变的n.变量；易变的东西variable-frequency startop变频起动variable separation approach分离变量法Variable rate of temperature气温变化率variable frequency generator可变频率发生器variable-difference method变量差分法variable-resistance pickup(可)变电(阻)拾声器variable interest investment浮息投资variable frequence microwave变频微波variable-reluctance pickup可变磁阻拾音器variable - frequency motor变频电机