Those who engaged in activities that were not intellectually challenging, either in a social group or alone, did not show such improvements.
2017年12月四级真题（第三套）阅读 Section B
英语六级真题
For one, it deprives students of the luxury of time to roam (遨游) intellectually.
出自-2012年6月阅读原文
Students don't have much time to roam intellectually
出自-2012年6月阅读原文
In Einstein's day, there were only a few thousand physicists worldwide, and the theoreticians who could intellectually rival Einstein probably would fit into a streetcar with seats to spare.
出自-2010年12月阅读原文
The exact type of stimulation that an individual uses is not as important as being intellectually engaged.
2016年6月六级真题（第二套）听力 Section C
柯林斯高阶英汉双解学习词典释义
ADJ
智力的;脑力的;理智的
Intellectual means involving a person's ability to think and to understand ideas and information.