皖北煤电再进500强的奋斗目标终于实现了！
The goal of entering Top 500 again has eventually come true!
本文以皖北地区的石灰岩山地为对象，对该地区的植被进行了调查和研究。
Investigation on natural secondery growth forest commulities in limestone mountain region of Shexian county;
本文以皖北地区的石灰岩山地为对象，对该地区的植被进行了调查和研究。
Investigation on natural secondery growth forest commulities in limestone mountain region of Shexian county;
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