piles of unsold books一堆堆卖不出去的书

Thirteen per cent of Christie's coin and banknote auction went unsold.佳士得有13%的硬币和纸币拍卖流拍。

unsold tickets未售出的票

They slashed the prices of merchandise to shift racks of unsold goods.他们为了把多个货架上的滞销商品售出而大幅削价。