No wonder that people are more tired and are not interested in reading books as much as in the past.

no 的意思是"不、没有"，用于否定。 wonder 作为名词时表示"惊奇、奇迹"，作为动词时表示"想知道、感到惊奇"。 no wonder 是一个固定搭配，表示"难怪、不足为奇"，用来表达对某件事不感到惊讶。