付款方式的說法:
直接付款 pay in cash
支票付款 pay by check
信用卡付款 pay with credit card
分期付款 pay by installment
頭期款 down payment
打折的常見說法:
折扣 discount
打七折 to give a 30% discount
打九折 to offer a 10% discount
打五折 50% off
降價出售 on sale
便宜貨 bargain
討價還價 to bargain with sb.