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In recent years, the concept of 10,000 hours has become very popular, but the actual 10,000 hours is not a universal truth. There are many restrictions. Most people do not know that 10,000 hours under "deliberate practice" are only useful. However, there has been a lack of systematic exposition on how to practice deliberately. Many books are relatively simple, and this book focuses on this topic. Deliberate practice is a higher-level learning method, which can make you improve your learning effect and shorten your learning time in a short period of time, and make you go to the road to excellence.The United States is a paradise for shopping, not only the great material abundance and reasonable price, but also his respect for every customer. The experience of returning a product made me feel even more deeply about it.约翰•波特（John Porter）回来了，而这一次他处在一个前所未有的困境中。长剑反刺，犹如灵蛇，如梦如幻。Https://www.jiemian.com/article/1911363.html