sealed bids

例句：

1. 1. The auction house has received a large number of sealed bids for the new car.
   拍卖行收到了大量新车的密封报价。
2. 2.The company decided to accept only sealed bids from potential investors.
   公司决定只接受潜在投资者的密封报价。
3. 3. The sealed bids were opened during the auction, revealing the winning bidder.
   在拍卖中，密封报价被开启，揭示了获胜者。