Steven: If it isn't suitable, can I bring it back?
Seller: Of course. But you must take care of your receipt.
Steven：Can you explain it more to me?
Seller: OK. It can be refunded if there's something wrong with it. Return your purchase within 14 days for a full refund.
Steven: By the way, may I have another brand instead?
Seller: Certainly. But you can only change it for goods with the same price or lower.
Steven: Oh, I see. I'll take it.

史蒂文：如果不合適的話，我能退貨嗎？
賣主：當然可以，只是你一定要保管好收據。
史蒂文：可以多給我解釋一下嗎？
賣主：好的。如果質量有問題，可以退貨。購買14天內可以退全款。
史蒂文：順便問一下，可以換另一種牌子嗎？
賣主：當然了。但你只能調換成同等價位或是較低價位的商品。
史蒂文：哦，我明白了。我買下了。