Program testing can be used to show the presence of bugs, but never to show their absence!
程序测试可以用来显示错误的存在,但永远不能显示它们的缺失!
成长的唯一途径就是挑战自己。
I don't try to time the market. I just try to buy stocks that are undervalued.
最好的工程师不仅解决问题,还重新定义可能性。