Courage is resistance to fear, mastery of fear - not absence of fear.

The energy transition is not just about switching from fossil fuels to renewables. It's about providing more energy with fewer emissions.

Without food, man can live at most but a few weeks; without it, all other components of social justice are meaningless.

计算学习理论中的挑战在于理解学习算法的能力和局限性。