variableareaadj.可变截面的variableadj.可变的；易变的n.变量；易变的东西variable structure变结构variable speed box变速装置,变速箱variable size item可变大小项variable indicator变动指标variable step size可变步长variable underflow可变底流variable precision变精度variable short end可变短路器variable direction变向variable condition变工况