预付款

例句：

1. 1. We need to pay the prepayment before we can proceed with the project.
   我们需要在项目开始前支付预付款。
2. 2.The hotel requires a 5% deposit as a prepayment for the room reservation.
   酒店要求作为房间预订的预付款支付5%。
3. 3. Before signing the contract, the buyer is required to make a prepayment of 20% of the total price.
   在签订合同之前，买方需要预付总价的20%作为定金。