不要让昨天占据今天太多时间。
Don't let yesterday take up too much of today.
保持领先的唯一途径是不断创新和适应。
任何优秀的飞行员,无论他有多么高的天赋和丰富的经验,都不会不使用检查表。
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.