写作是唯一一个如果你赚不到钱也没人会觉得你可笑的职业。
The power of positive thinking is the ability to generate a feeling of certainty in yourself when nothing in the environment supports you.
技术正在将煤炭开采从蛮力行业转变为精密操作。
研究学习的唯一有意义的方法是通过客观测量。
The only limits in life are the ones you make.