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

no 表示"没有"，用于否定。 wonder 是名词，意思是"惊奇、惊讶"或"奇迹"。 no wonder 是一个固定短语，表示"难怪"或"不足为奇"，用来表达对某事不感到惊讶。