拍卖在基本形式之上存在着某些不同,包括限时、最低或最高竞投价格、以及用于决定竞价胜出者和成交价格的特别规则。参与拍卖的人不一定知道其他参与者的身份或者行为。根据拍卖形式的不同,竞投者可能会亲自出席,或者运用各种远程手段——例如电话和因特网——参与拍卖会。 There are some differences in the basic form of an auction, including time-limited, minimum or maximum bid prices, and special rules for determining bid winner and closing price. The person participating in the auction does not necessarily know the identity or behavior of the other participants. Depending on the auction form, bidders may attend in person or through various remote means, such as telephone and internet, to participate in the auction.