看了四十分钟，准备出门带娃了 写memo的时候问自己的几个问题，我觉得写的挺好的 - Why now (为什么是现在？) - how are you going to make money?(怎么赚钱？) - what problem are you solving?(解决什么问题？) - who are you solving that problem for? (为哪些人解决这个问题？)