"not even Hercules could contend against two" meaning in 英語

{
  "categories": [
    {
      "kind": "other",
      "name": "英語",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "英語 ことわざ",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "英語 成句",
      "parents": [],
      "source": "w"
    }
  ],
  "etymology_texts": [
    "ラテン語のことわざ、ne Hercules quidem adversus duosの訳。"
  ],
  "lang": "英語",
  "lang_code": "en",
  "pos": "phrase",
  "pos_title": "成句",
  "senses": [
    {
      "glosses": [
        "ヘラクレスですら、2人同時に戦えはしなかった。多勢に無勢。"
      ],
      "id": "ja-not_even_Hercules_could_contend_against_two-en-phrase-IOkhbtUb"
    }
  ],
  "tags": [
    "idiomatic"
  ],
  "word": "not even Hercules could contend against two"
}

{
  "categories": [
    "英語",
    "英語 ことわざ",
    "英語 成句"
  ],
  "etymology_texts": [
    "ラテン語のことわざ、ne Hercules quidem adversus duosの訳。"
  ],
  "lang": "英語",
  "lang_code": "en",
  "pos": "phrase",
  "pos_title": "成句",
  "senses": [
    {
      "glosses": [
        "ヘラクレスですら、2人同時に戦えはしなかった。多勢に無勢。"
      ]
    }
  ],
  "tags": [
    "idiomatic"
  ],
  "word": "not even Hercules could contend against two"
}