The only time you should ever look back is to see how far you've come.
你唯一应该回头看的时候是看你已经走了多远。
To be yourself in a world that is constantly trying to make you something else is the greatest accomplishment.
数据库中最重要的东西是模式。
柠檬问题是指买家无法确定产品质量，因此只愿意支付反映平均质量的价格。