Researchers have established that when people are mentally engaged, biochemical changes occur in the brain that allow it to act more effectively in cognitive（认知的）areas such as attention and memory. This is true regardless of age.的翻译：正在翻译，请等待... 什么意思？中文翻译英文，英文翻译中文，怎么说？

研究人员已经确定，当人们从事精神，生化变化发生在大脑中，允许它在认知（认知的）的地区，如注意力和记忆力，更有效地采取行动。这才是真正的不分年龄。