"nu eenmaal" meaning in Dutch

{
  "head_templates": [
    {
      "args": {},
      "expansion": "nu eenmaal",
      "name": "nl-adv"
    }
  ],
  "lang": "Dutch",
  "lang_code": "nl",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Dutch entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Dutch modal particles",
          "parents": [
            "Modal particles",
            "Particles",
            "Lemmas"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "examples": [
        {
          "english": "You can't do much about it, that's just the way it is.",
          "text": "Je kan er weinig aan doen, het is nu eenmaal zo.",
          "type": "example"
        }
      ],
      "glosses": [
        "just, as a matter of fact; (a modal particle indicating a certain fact that the speaker accepts is unlikely to change.)"
      ],
      "id": "en-nu_eenmaal-nl-adv-y5pipiiQ",
      "links": [
        [
          "just",
          "just"
        ],
        [
          "as a matter of fact",
          "as a matter of fact"
        ]
      ],
      "synonyms": [
        {
          "word": "nou eenmaal"
        }
      ]
    }
  ],
  "word": "nu eenmaal"
}

{
  "head_templates": [
    {
      "args": {},
      "expansion": "nu eenmaal",
      "name": "nl-adv"
    }
  ],
  "lang": "Dutch",
  "lang_code": "nl",
  "pos": "adv",
  "senses": [
    {
      "categories": [
        "Dutch adverbs",
        "Dutch entries with incorrect language header",
        "Dutch lemmas",
        "Dutch modal particles",
        "Dutch multiword terms",
        "Dutch terms with usage examples",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "examples": [
        {
          "english": "You can't do much about it, that's just the way it is.",
          "text": "Je kan er weinig aan doen, het is nu eenmaal zo.",
          "type": "example"
        }
      ],
      "glosses": [
        "just, as a matter of fact; (a modal particle indicating a certain fact that the speaker accepts is unlikely to change.)"
      ],
      "links": [
        [
          "just",
          "just"
        ],
        [
          "as a matter of fact",
          "as a matter of fact"
        ]
      ]
    }
  ],
  "synonyms": [
    {
      "word": "nou eenmaal"
    }
  ],
  "word": "nu eenmaal"
}