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杂文扎龙保护区今年20只丹顶鹤被放回野外_社会生活
Twentyred–crownedcranesbredincaptivity1werereleasedintothewildthisyearintheZhalongNationalNatureReserve,innortheastChina'sHeilongjiangProvince,sourceswiththereservesaid. 扎龙国家自然保护区今年有20只……
