() a situation in which a buyer cannot see goods for sale, but must rely on a description of the goods, for example on a label or packet 凭说明书买卖；凭说明售货◆As catalogues use sale by description, the law requires that their descriptions are accurate. 因为商品目录上的货品是凭说明出售，所以法律要求对这些货物的说明必须准确。