名词临时填补空缺的人; 代替者; 补充物; 补助光线
形容词临时填补性的
名词
1. I'm only here as a fill-in while she's away.
她外出期间，我是替工。
noun
1. someone who takes the place of another (as when things get dangerous or difficult)
e.g. the star had a stand-in for dangerous scenes
we need extra employees for summer fill-ins
Synonym: stand-in substitute relief reliever backup backup man