名詞 walk-on:

1. plays a small part in a dramatic production

形容詞 walk-on:

1. not capable of or especially not involving speech or spoken lines
   同義詞：nonspeaking

walk-on

n.（名詞）
A minor role in a theatrical production, usually without speaking lines.
小配角：在戲劇制作中通常沒有臺詞的小角色
A performer playing such a role.
配角演員：出演上述角色的演員