预付款项: advance paymentadvanced paymentsprepayments / payment in advance
往来: 1.(去和来) come and go; to and fro; back and forth 短语和例子大街上往来的车辆很多。 various kinds of vehicles run to and fro in the street.2.(互相访问; 交际) contact; dealings; intercourse 短语和例子贸易往来 trade contacts
