We don't compete with anyone but ourselves to be the best we can be.
我们不与任何人竞争,只与自己竞争,做到最好。
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。
The best fertilizer for any piece of land is the footprints of its owner.
In despair, we can find true hope.