一个农民种了一大园子蚕豆,销售时需要清除其里面的砂砾等杂质。这个老农要辛辛苦苦地拣上好多天,他的小儿子对他爸爸说,他能在一天之内就把蚕豆中的杂质弄掉。他爸爸不以为然的说:“你要是能一天就干完我一周才干完的事.我就让你爬在我背上当马骑绕整个蚕豆园一周。”第二天傍晚,当这个老农看到圆鼓鼓的无杂质 A farmer has planted a large garden bean, and it needs to remove impurities such as grit from inside. The old farmer had to pick up hard for many days. His younger son said to his father that he could get rid of the impurities in the beans within a day. His dad disapprovingly said, “If you can finish what I did in a week, I will let you climb on my back when the horse rides around the whole broad bean farm for one week.” The next evening, when the old farmer saw round drums, Without impurities