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"，在这里与 wonder 搭配使用。 wonder 的意思是"惊奇、疑惑"，指对某事感到惊讶或好奇的心理状态。 no wonder 是一个固定短语，表示"难怪、不足为奇"，用于表达对某种情况或结果不感到惊讶。