The supreme happiness of life is the conviction that we are loved.
可持续性不是一种选择,而是我们对后代的责任。
想让小孩子在旅行中表现良好,可以准备一袋他们喜欢的糖果,当他/她不乖时,就向窗外扔掉一块糖。
We are the product of our evolutionary past.