"質量數" meaning in Chinois

{
  "categories": [
    {
      "kind": "other",
      "name": "Noms communs en chinois",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "Chinois",
      "orig": "chinois",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "Chinois",
  "lang_code": "zh",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Lexique en chinois de la physique",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "Nombre de masse."
      ],
      "id": "fr-質量數-zh-noun-THTUcbKq",
      "tags": [
        "physical"
      ]
    }
  ],
  "word": "質量數"
}

{
  "categories": [
    "Noms communs en chinois",
    "chinois"
  ],
  "lang": "Chinois",
  "lang_code": "zh",
  "pos": "noun",
  "pos_title": "Nom commun",
  "senses": [
    {
      "categories": [
        "Lexique en chinois de la physique"
      ],
      "glosses": [
        "Nombre de masse."
      ],
      "tags": [
        "physical"
      ]
    }
  ],
  "word": "質量數"
}