A proof is a device for convincing someone else that a mathematical statement is true.

The gritty individual approaches achievement as a marathon; his or her advantage is stamina.

实现明天理想的唯一障碍是今天的疑虑。

The more you experience positive emotions, the more open you become. The more open you are, the more you see. The more you see, the more you can do. The more you can do, the more you can grow.

My parents taught me to never give up.

我们把世界看错了，反说它欺骗我们。

煤炭行业要坚定不移地走安全高效、清洁低碳的发展道路。

史记