“drought central China in 10th century”的概念、定义、翻译、参考文献-科学参考

单词	drought central China in 10th century
释义	drought central China in 10th century Encyclopedia 工学〔中国历史上重大的水旱灾害〕释 drought central China in 10th century10世纪中原大旱 10世纪，中国以中原地区为中心发生的一场持续3年的大旱灾。
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