presenter       
noun [ C ] UK uk/prɪˈzen.tər/ us/prɪˈzen.t̬ɚ/
B2 (电视或广播)节目主持人
someone who introduces a television or radio show
  a news/sports presenter 新闻/体育节目主持人 
 children's television presenters 儿童电视节目主持人 
 - More examples
 - Duggan, a TV presenter and one-time journalist, made the announcement last week.
 - She was speaking in her capacity as a novelist, rather than as a television presenter.
 - These charms have earned the television programme's presenter the sobriquet 'the thinking woman's crumpet'.
 - He's one of those sportsmen who reinvent themselves as TV presenters.
 - She criticized the synthetic charm of television presenters.