dumbing-down
noun [ U ] informal disapproving uk/ˌdʌm.ɪŋˈdaʊn/ us/ˌdʌm.ɪŋˈdaʊn/
（尤指为了更加普及而）简化，通俗化
the act of making something simpler and easier for people to understand, especially in order to make it more popular
the dumbing-down of television 电视的普及