On marketing: "In the old world， you devoted 30% of your time to building a great service and 70% of your time to shouting about it. In the new world， that inverts."
粒子的概念只是一种近似，仅在特定极限情况下有效。
Credit market discrimination makes the poor pay higher interest.
失败只是另一种学习方式。
"Illustrations are not just decorations; they are an integral part of the storytelling."