他在电影中跑龙套。
tāzài diànyǐng zhōng pǎolóngtào 。
He plays a small role in the movie.
她虽然只是跑龙套，但她的表演还是很出色。
tā suīrán zhǐshì pǎolóngtào ， dàn tāde biǎoyǎn háishì hěn chūsè 。
Although she is just playing a small role, her performance is still outstanding.
很多演员开始时都会跑龙套。
hěnduō yǎnyuán kāishǐ shí dōuhuì pǎolóngtào 。
Many actors start by playing small roles.