"rearrange the deck chairs on the Titanic" meaning in 英語

{
  "categories": [
    {
      "kind": "other",
      "name": "英語",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "英語 成句",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "英語",
  "lang_code": "en",
  "pos": "phrase",
  "pos_title": "成句",
  "senses": [
    {
      "glosses": [
        "（沈没しかかったタイタニック号のデッキチェアを並べ直す→）緊急の事態において些細なことをする。"
      ],
      "id": "ja-rearrange_the_deck_chairs_on_the_Titanic-en-phrase-0x8IG4gZ"
    }
  ],
  "tags": [
    "idiomatic"
  ],
  "word": "rearrange the deck chairs on the Titanic"
}

{
  "categories": [
    "英語",
    "英語 成句"
  ],
  "lang": "英語",
  "lang_code": "en",
  "pos": "phrase",
  "pos_title": "成句",
  "senses": [
    {
      "glosses": [
        "（沈没しかかったタイタニック号のデッキチェアを並べ直す→）緊急の事態において些細なことをする。"
      ]
    }
  ],
  "tags": [
    "idiomatic"
  ],
  "word": "rearrange the deck chairs on the Titanic"
}