前不久的一个阴雨天,我在街上买菜,卖菜人是一个四五十岁的农民。他挑着担子叫卖,豇豆一元五角一把。不巧那天我身上的零钱买了别的东西,只剩下一元三角,买一把豇豆不够。协商时我拿起一把豇豆,向他说明差两角零钱的情况,并主动地从一把 Not long ago, a rainy day, I bought food in the street, selling vegetables is a 40-year-old peasant. He lugs a burden to sell, a peanut dollar Pentagon. Unfortunately, that day my body changed to buy something else, leaving only a dollar, buy a cowpea is not enough. During the negotiation, I picked up a cowpea and explained to him the difference between the two corners, and took the initiative from one