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Deliberate practice does not deny the importance of situation, but in some best sellers, the mainstream methods that have been confirmed by learning science are placed in a humble corner. Tacit knowledge, which is closely related to learning, is ignored. A large number of studies in learning science show that the best way for adults to learn is not to practice alone, but to learn in situations. Effective learning is to enter relevant situations and find one's own "learning community". At the beginning, learners turn around important members and do some peripheral work. With the growth of skills, they enter the core of the learning community circle, gradually do more important work and eventually become experts.同一时刻，漆黑的边境公路上，几个如鬼魅般的黑衣人突然从天而降，手持先进的重火力武器，抬手间就将一伙正在交易的走私犯全部灭口，就在他们打算全身而退的时候，却已经被边防武警层层包围，血战一触即发。R"State Mode"等他们走后，书房拐角处两个护卫互相耳语。Norton AntiVirus/Norton Internet Security (later than 2012, up to version 22.6. X.x)