马克以前办完就想扔，后来转账查询时才知道，回单最好先留几天。
Mark used to want to throw them away right after finishing, but later when checking transfers, he realized it's best to keep the receipts for a few days.
Mark used to want to throw them away right after finishing, but later when checking transfers, he realized it's best to keep the receipts for a few days.