commentator
noun [ C ] uk/ˈkɒm.ən.teɪ.tər/ us/ˈkɑː.mən.teɪ.t̬ɚ/
（广播或电视的）解说员，评论员
a reporter for radio or television who provides a spoken description of and remarks on an event, especially a sports competition, as it happens
a radio commentator 广播解说员
a sports/football commentator. 体育节目／足球解说员