他不过是个跑龙套的演员。

He is just a small-time actor.

跑龙套这事，如果干得好，就叫友情演出；

Play a bit role this matter, if the dry well, call friendship performance;

我请求摄影师在采访时为我拍一些跑龙套镜头。

I asked the cameraman to give me some cutaways for the interviews.

当劳通过表演找到了这些梦魇的出口时，同学们躲避他像在躲避一个“跑龙套的”。

When Lowe sought escape from these nightmares by acting in plays, classmates shunned him as “an acting fag.

但是在日常交流中，“跑龙套”可以指代在任何行当中不起眼的人物，比如勤杂工、四处做零活的工人等。

But in daily conversations, it refers to anyone who only plays a bit role such as a utility man or a general handyman in any event, project or business.