life is like a roller coaster, entrepreneurship is also, there is no eternal success, there is no eternal failure. Many of the best inventors and entrepreneurs admit that they have failed at some point in their careers. The operating principle of entrepreneurs and the twists and turns "the famous author Richard · Christensen believes that although the link failure is normal life and business, but most of us don’t can face it.




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2. three months earnings: "efficient" failure of

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