"there's no such thing as a free lunch" meaning in 英語

{
  "categories": [
    {
      "kind": "other",
      "name": "英語",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "英語_ことわざ",
      "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",
  "related": [
    {
      "word": "free lunch"
    }
  ],
  "senses": [
    {
      "glosses": [
        "只の昼食みたいなことは有るわけがない。只より高いものはない。一時的には、只だと思っても、後に何らかの対価を求められるものであるということ。"
      ],
      "id": "ja-there's_no_such_thing_as_a_free_lunch-en-phrase-6YAUMNXa"
    }
  ],
  "synonyms": [
    {
      "word": "TANSTAAFL"
    },
    {
      "word": "TINSTAAFL"
    }
  ],
  "tags": [
    "idiomatic"
  ],
  "word": "there's no such thing as a free lunch"
}

{
  "categories": [
    "英語",
    "英語_ことわざ",
    "英語_成句"
  ],
  "lang": "英語",
  "lang_code": "en",
  "pos": "phrase",
  "pos_title": "成句",
  "related": [
    {
      "word": "free lunch"
    }
  ],
  "senses": [
    {
      "glosses": [
        "只の昼食みたいなことは有るわけがない。只より高いものはない。一時的には、只だと思っても、後に何らかの対価を求められるものであるということ。"
      ]
    }
  ],
  "synonyms": [
    {
      "word": "TANSTAAFL"
    },
    {
      "word": "TINSTAAFL"
    }
  ],
  "tags": [
    "idiomatic"
  ],
  "word": "there's no such thing as a free lunch"
}