export prepayment的用法和樣例：
例句
- Adopting prepayment or margin transaction system will be favorable for online trading development in the future.
網路交易在現行交割制度下存在違約風險，采預收款券或保證金之交易方式，有利於網路交易未來的發展。 - When business operators supply goods or services on a prepayment basis, they should do so according to agreement.
經營者以預收款方式提供商品或者服務的，應當按照約定提供。
