Pessimism leads to weakness, optimism to power.

Innovation in coal mining isn't just about extraction—it's about doing it smarter, safer, and with greater respect for the environment.

The use of a program to prove the 4-color theorem will not change mathematics - it merely demonstrates that the theorem, a challenge for a century, is probably not important to mathematics.

世界的真正历史是伟人的历史。

译文：一起观察世人所崇尚的，悠闲地选择美好的时光。

我不和别人竞争。我和自己竞争。

眼睛是灵魂之窗。