"gravity field" meaning in All languages combined

{
  "categories": [
    {
      "kind": "other",
      "name": "待分類的英語詞",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "拉丁文字",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "英語",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "英語",
  "lang_code": "en",
  "pos": "unknown",
  "senses": [
    {
      "glosses": [
        "重力场"
      ],
      "id": "zh-gravity_field-en-unknown-Z7NZ5SWQ"
    }
  ],
  "word": "gravity field"
}

{
  "categories": [
    "待分類的英語詞",
    "拉丁文字",
    "英語"
  ],
  "lang": "英語",
  "lang_code": "en",
  "pos": "unknown",
  "senses": [
    {
      "glosses": [
        "重力场"
      ]
    }
  ],
  "word": "gravity field"
}