Imagine a scenario ,where you are sitting at home watching television or reading a book , suddenly a light buld is turned on in the dark tunnel of your mind as a thought or an idea crosses your mind .

• 想像这样一个场景：你正坐在家里看电视或看书，一个想法或念头闪过脑际，令你眼前一亮，豁然开朗。