the difference between seeing words, hearing words, reading words and generating words can correspond to different aspects of what part of your brain is active.

看到词句,听到词句,阅读词句,创造词句,这些不同的活动,会激活你不同的大脑区域

耶鲁公开课 - 心理学导论课程节选

The part of their brain that could control certain behaviors is just not active yet.

控制特定行为的大脑区域,还未曾被激活

耶鲁公开课 - 心理学导论课程节选