• 煤炭资源开发过程中,尚存在着资源浪费,开发秩序混乱以及环境污染严重问题

    However, there are serious issues, such as a waste of resource, disordered mining and environment pollution during development of coal resource.

    youdao

  • 煤炭资源开发过程中,尚存在着资源浪费,开发秩序混乱以及环境污染严重问题

    However, there are serious issues, such as a waste of resource, disordered mining and environment pollution during development of coal resource.

    youdao

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