The cognitive flexibility, on the other hand, is the ability to quickly adapt oneself to new environments/tasks, or changing situations, thereby allowing the better management of unexpected events (Cañas et al. 2003). It describes the capacity to swiftly adjust one's thoughts and behavior to adapt to a dynamic environment 这两句话有些重复，请你帮我修改一下

这两句话确实在表达上有所重叠，主要强调了认知灵活性的概念。下面是对这两句话的修改建议：

1. "Cognitive flexibility refers to the ability to adapt one's thoughts and behaviors to new environments, tasks, or changing situations, which is crucial for effectively managing unexpected events (Cañas et al. 2003)."

2. "This capacity allows individuals to adjust rapidly in response to a dynamic environment, enhancing their ability to navigate through unforeseen circumstances."

这样修改后，第一句话定义了认知灵活性并强调了其重要性，第二句话则进一步解释了这种能力如何帮助人们应对不可预见的情况。