现实总是比我们对它的任何想法都更加丰富。
Reality is always richer than any idea we can have of it.
Natural experiments are a powerful tool for understanding causal relationships in the real world.
我只是想传播正能量。
The best businesses are built on passion and purpose.
就算你要杀人,礼貌也伤不着你。
我不喜欢被定义。