"fine structure" 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"
    },
    {
      "kind": "other",
      "name": "電機工程專有名詞",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "英語",
  "lang_code": "en",
  "pos": "unknown",
  "senses": [
    {
      "glosses": [
        "精细结构\n* 正體: 精細構造[電機工程]"
      ],
      "id": "zh-fine_structure-en-unknown-dRGx1T36"
    }
  ],
  "word": "fine structure"
}

{
  "categories": [
    "待分類的英語詞",
    "拉丁文字",
    "英語",
    "電機工程專有名詞"
  ],
  "lang": "英語",
  "lang_code": "en",
  "pos": "unknown",
  "senses": [
    {
      "glosses": [
        "精细结构\n* 正體: 精細構造[電機工程]"
      ]
    }
  ],
  "word": "fine structure"
}