短語詞組短語even load distribution 負荷平均分配even group distribution 項群分布even air distribution 均勻配風(fēng)even source distribution 均源分布method of even burden distribution 均勻布料even distribution of weight 平衡electricity with even distribution 均勻帶電球面even distribution of seed 種子均布non -even distribution 非均勻分布 返回 even distribution