Even someone like Bill Gates can feel uncomfortable spending his billions; it is said he used to always travel economy class because he didn’t see the need to spend more money on first class.
甚至像比尔盖茨先生也会因为花钱而感到不高兴，有人说他乘飞机时都选择经济舱而不是头等舱。
During the first part of the class Bill presented an analysis of music as an example rule-based design, and played several pieces on the piano.
在课程的第一部分，比尔报告一个音乐分析，作为以规则为基础进行设计的范例。并且演奏了几首钢琴曲。
Bill: Yes, you did and I'm green with envy. Flying First Class around the world must have cost a bomb?
比尔：你有啊，我很羡慕。坐头等舱去环游世界一定花很多钱吧？
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