"низовье" meaning in 俄语

{
  "categories": [
    {
      "kind": "other",
      "name": "俄语",
      "parents": [],
      "source": "w"
    },
    {
      "kind": "other",
      "name": "俄语名词",
      "parents": [],
      "source": "w"
    }
  ],
  "lang": "俄语",
  "lang_code": "ru",
  "pos": "unknown",
  "senses": [
    {
      "glosses": [
        "下游\n下游地带\n河口地带\n，复二-ьев〔中〕下游，下游地区，下游地带\n#::в ～ях Во́лги在伏尔加河下游地区."
      ],
      "id": "zh-низовье-ru-unknown-fL9XreEc"
    }
  ],
  "word": "низовье"
}

{
  "categories": [
    "俄语",
    "俄语名词"
  ],
  "lang": "俄语",
  "lang_code": "ru",
  "pos": "unknown",
  "senses": [
    {
      "glosses": [
        "下游\n下游地带\n河口地带\n，复二-ьев〔中〕下游，下游地区，下游地带\n#::в ～ях Во́лги在伏尔加河下游地区."
      ]
    }
  ],
  "word": "низовье"
}