• 交通运输系统人类生活社会经济活动重要组成部分

    Transport system is an important part of human life and socioeconomic activities.

    youdao

  • 是因为淡水生态系统人类活动密切相关。

    That's because freshwater ecosystems are so closely linked to human activity.

    youdao

  • 是因为淡水生态系统人类活动密切相关。

    That's because freshwater ecosystems are so closely linked to human activity.

    youdao

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