action hero       
noun [ C ] uk/ˈæk.ʃən ˌhɪə.rəʊ/ us/ˈæk.ʃən ˌhɪr.oʊ/
 动作片主角
the hero (= the main character, who is usually good) of a film, television programme, or sometimes a book, who experiences and does a lot of exciting and often violent things, such as fighting against bad people or dangerous creatures
  Arnold Schwarzenegger has played some of the greatest action heroes of all time. 阿诺德·施瓦辛格扮演过一些有史以来最伟大的动作片英雄。 
 - More examples
 - Archival research might seem like an odd line of work for action heroes like Indiana Jones.
 - The action hero primarily uses his fighting skills to achieve his goals in a story.
 - These had a major cultural impact, as young men modelled themselves on action heroes.
 - The film reimagines Ada Lovelace, a reclusive mathematician, as an action hero.
 - The tiny action heroes in this new series are called on to fight against aliens in order to save their parents.