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他才不会那么俗。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.一个不可否认的事实，司马欣出了函谷关，回棘原去了，而且他认定赵高要杀他。[Favorite this article] [Download]当下板栗领着山芋等人上前见过各家长辈，一一寒暄问好。正此时，杨长帆刚好在营门口路过，见状惊讶前来。The array in this topic is a sparse array and will not traverse (from indexes 3-9) "pits". These indexes do not exist in the array and will skip these pits directly. A value equal to undefined can never be filtered.