短语词组短语tax x base 税基;计税基数Erosion of tax base 税基腐蚀preferential tax base 税基式优惠Tax Base If 应税the tax base 计税基础Borden Tax Base 扩阔税基wide tax base 宽税基economic tax base 经济税基Widen tax base 全面征税 返回 tax base