今天我们播下的每一粒种子都是对后代的承诺。
The evidence for evolution is overwhelming.
You have to be willing to sacrifice to get what you want or what you need.
The key to nudge is to make it easy for people to make better choices.
滚动的弹丸，掉落到凹陷之处，便不再滚动了；流传的谣言，到智慧的人那里，便不再流传了。