"The best books are the ones that leave you a little bit different than when you started."
形容世事变化无常，难以预测。
A people without children would face a hopeless future; a country without trees would face a future with even less hope.
成功的最好方式是帮助别人成功。
The secret of getting ahead is getting started.
The real test of an algorithm is not just its correctness, but its scalability and robustness.