最可持续的树是仍然屹立不倒的树。
定义属于下定义的人,而不属于被定义的人。
"Randomized experiments are the gold standard for causal inference, but they are not always feasible."
I don't give up. I level up.
每个故事都有两面——表面上的和隐藏在下面的。
Every soul is a star.