Pain is the absence of pleasure, pleasure is the absence of pain.
In mathematics, the simplest questions often lead to the most profound discoveries.
可持续采石意味着像倾听股东一样认真地倾听土地的声音。
The boundaries which divide Life from Death are at best shadowy and vague. Who shall say where the one ends, and where the other begins?
Innovation is the key to transforming the traditional coal industry into a modern and efficient sector.
唯一的正义就是遵循灵魂真诚的直觉,无论是愤怒的还是温柔的。