美国农民是我们经济中唯一必须以零售价购买所需一切，以批发价出售所产一切，并支付双向运费的人。
The American farmer is the only man in our economy who has to buy everything he buys at retail, sell everything he sells at wholesale, and pay the freight both ways.
创新不是对每件事都说“是”，而是对所有非关键特性说“不”。