offstage
adjective uk/ˌɒfˈsteɪdʒ/ us/ˌɑːfˈsteɪdʒ/
不在舞台上的，台后的，幕后的
off the stage, or happening behind or at the side of the stage, so that people who are watching cannot see
The main characters are offstage for most of the second act. 第二幕的大部分时间主角都没有上场。
（演员）在舞台之外的，舞台下的，现实生活中的
used to describe a performer when they are not performing in a play or film, etc.
Though best known for the funny and outspoken roles that she plays on screen, offstage she is shy and rather serious. 虽然在银幕上她以扮演滑稽可笑、口无遮拦的角色而闻名，但在现实生活中，她既腼腆又相当严肃。