资料来源 : pyDict

临时填补空缺的人,临时填补物临时填补性的

资料来源 : WordNet®

fill-in
     n : someone who takes the place of another (as when things get
         dangerous or difficult); "the star had a stand-in for
         dangerous scenes"; "we need extra employees for summer
         fill-ins" [syn: {stand-in}, {substitute}, {relief}, {reliever},
          {backup}, {backup man}]