The causal framework is the foundation of scientific reasoning.

If you're not stubborn, you'll give up on experiments too soon. And if you're not flexible, you'll pound your head against the wall and you won't see a different solution to a problem you're trying to solve.

我们思考是为了适应。

The poor dream all their lives of getting enough to eat and looking like the rich. And what do the rich dream of? Losing weight and looking like the poor.

最平凡的生活也能包含非凡的故事。

抗战将是漫长而艰苦的，但我们的事业是正义的，我们必将胜利。