“management of sand mining in Yangzi river”的概念、定义、翻译、参考文献-科学参考

单词	management of sand mining in Yangzi river
释义	management of sand mining in Yangzi river Encyclopedia 工学河道湖泊管理释 management of sand mining in Yangzi river长江河道采砂管理规范长江河道采砂行为的管理工作。
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