Homogeneous is used to describe a group or thing which has members or parts that are all the same. 同种类的
adjective [原级] 同种类的,同性质的;齐性的,齐次的;同形态(固态、液态或气态)的
Audiences are smaller and more homogeneous than they have been in the past. 受众规模比过去更小、更同质。