Thanks to Sandy/ˈsændi/ Riddick and his friends for inviting Jessica and me to visit Columbia/kəˈlʌmbiə/. It was interesting to talk to a small group of students around a table instead of a large group in a lecture/ˈlektʃə/hall/hɔːl/.
保罗·格雷厄姆（Paul Graham）是美国知名的程序员、风险投资家、作家，也是硅谷著名创业孵化器 Y Combinator（YC） 的联合创始人，常被称为“硅谷创业教父”