Damm, my kindle 2 is broken since I put it in my bag for several days. I guess the screen is broken since nothing could display. I have booked a kindle slim with price 596RMB in taobao. I think I could buy book from amazon now. From this point, it is a good choice.

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忘了在哪篇文章上看过，说交换是人类文明进步的基本动力。因为交换，所以专著；因为交换，所以高效。可以说是交换促进了人类生产效率的不断提高。

ppt高手都知道一个基本准测: 人的信息接受能力是有限的。其实除此之外，人在很多其它能力上也是有很大缺点的。但分工合作和足够的种群数量是人类解决自身局限的极好方法。从抽象的角度讲，专是群体在个体处理能力低下的前提下的最优策略。交换则是这种策略下群体内部资源配置的最优选择。

中国的政治体制还停留在全面大政府的时代，完全没有体现分工合作的精神。这种体制的问题在于，单一政府的力量无法高效的利用资源去解决问题。

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Cellphone become stronger and stronger from performance and functionality point of view. But still one question left in my mind: why do we need the cellphone? Actually the origin purpose of cellphone is contacting. At the beginning, we use voice to talk. Then we use SMS. Actually there are many ways of contacting, like MSN, gtalk, skype. I read some articles which said US&Canada operators earns nearl 20b US dollars from SMS every year. But how many money do Google/MS/Tencent earn from communication SW?

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