剑桥词典in which the amount offered by each person to buy something is not known by any of the other people involved （買方競投時出價保密的）秘密競投 a sealed-bid auction /sale 秘密競投的拍賣／銷售 The sale of the land will be a sealed-bid process . 這塊土地的出售將通過秘密競投方式進行。 返回 sealed-bid