说明：  通过揭示一般程序员，甚至是经验老道的职业程序员，如何在编程中避免犯错误、摔跟头，以提倡和鼓励预防性的程序设计。
(By revealing how ordinary programmers, even experienced professional programmers, can avoid making mistakes and falling behind in programming, in order to promote and encourage preventive programming.)