You can always juice sales by going down-market， but it's hard to go back upmarket.
当市场下跌时，你轻易的将好东西打折变卖，但是一旦市场向上，再想买回来，难之又难。
Leadership is about making others better as a result of your presence and making sure that impact lasts in your absence.
The Langlands program is a challenge to the boundaries of human knowledge.
最好的技术是无形的，它只是默默地发挥作用。
The human mind is capable of comprehending the universe because the universe has generated minds capable of comprehending it.