说明： 机器学习及其挑战，内容包括：机器学习及其重要性；机器学习角色的转变；五个挑战问题。研究机器学习的兄弟们要看看了。 (machine learning and its challenges, including : machine learning and its importance; Machine learning the changing roles; five challenges. The study machine learning to look at the brothers had.)
