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http://www.amazon.com/Hard-Thing-About-Things-Building/dp/0062273205/ref=sr_1_1?ie=UTF8&qid=1419108967&sr=8-1&keywords=hard+things+on+hard+things
您即将离开知乎,请注意您的帐号和财产安全。
http://www.amazon.com/Hard-Thing-About-Things-Building/dp/0062273205/ref=sr_1_1?ie=UTF8&qid=1419108967&sr=8-1&keywords=hard+things+on+hard+things