预测未来的最好方法就是创造未来。
里氏替换原则是面向对象编程中的一个基本概念,确保派生类可以替代其基类使用,而不会改变程序的正确性。
Policymakers should be open to revising their views based on new evidence.
I believe in making things that last, both physically and emotionally.
真正满足的唯一方法就是做你认为伟大的工作。