El hombre es el único animal que tropieza dos veces con la misma piedra.

子贡问：“孔文子凭什么获得‘文’的称号？”孔子说：“灵敏又好学，向比自己学问差的人请教时，不觉得没面子，所以称为‘文’。”

The world is full of beauty and ugliness, and it's up to us to choose which one we want to see.

理解自然的基本力量对于理解宇宙至关重要。

The wise are not ashamed to seek knowledge, for they know the ocean of wisdom is boundless.

The true cost of coal isn't just in its price, but in how we manage its consequences.

最终，我们都被自己的选择所定义。