短语 “a fighting chance” 用来描述做某件事情的可能性。它暗示虽然成功的可能性很小，但值得一搏。只要付出巨大的努力，奋勇一搏，就有可能获取成功。这个名词短语通常与动词 “have” 搭配使用，即 “have a fighting chance（有获得成功的一线可能）”。

例句
You should have a fighting chance of winning if you save some energy for the end of the race!
如果你留些力气到比赛最后，你就有可能获胜！

People have been surprised by the newcomer’s boxing ability. If she can survive the first two rounds, she may be in with a fighting chance of winning.
大家对这位新手的拳击能力感到惊讶。如果她能挺过前两轮，她就可能有获胜的机会。

I think I have a fighting chance of passing the interview if I can get past the application stage.
我觉得如果我能通过申请资料筛选的阶段，我就有机会通过面试。