将一段英文翻译为中文。
"Machine learning is a subset of artificial intelligence (AI) that provides systems the ability to automatically learn and improve from experience without being explicitly programmed. Machine learning focuses on the development of computer programs that can access data and use it to learn for themselves."
机器学习是人工智能的一个子领域，它为系统提供了在没有明确编程的情况下自动学习和改进的能力。机器学习侧重于开发能够访问数据并利用它自我学习的计算机程序。