tā / suī / rán / zhǐ / shì / yǎn / lóng / tào / què / bǎ / jué / sè / yǎn / de / hěn / rèn / zhēn

他虽然只是演龙套，却把角色演得很认真。

Although he only played a walk-on role, he performed it very seriously.