A statement is a means to convey information, a promise is a means to make a commitment.
Language is the writer's only tool, and yet it's never enough.
里氏替换原则是面向对象编程中的一个基本概念,它指出子类的对象应该能够替换超类的对象而不影响程序的正确性。
有时保持理智的唯一方法就是偶尔发疯。
如果你打球时不在乎,我们就赢不了。
You have to work hard to get what you want.