variableareaadj.可变截面的variableadj.可变的；易变的n.变量；易变的东西variable vane pump变量叶片泵variable reduction可变缩拍variable mechanism变量机构variable principle变分原理variable mesh size可变步长,可变网距variable - speed变速variable budgeting变动预算的编制variable weighting变量加权variable deduction变动减除数variable subdomain可变子域