◎寡不敌众guǎbùdízhòng
[be hopelessly outnumbered;A few are no match for the many] 较少的敌不过众多的,形容力量悬殊,无法对抗
周瑜虽得利,只恐寡不敌众,遂下令鸣金收住船只。——《三国演义》