declaration of rio de janeiro 里约热内卢宣言
declaration of rio
b里约热内卢的声明
以上为机器翻译结果，长、整句建议使用 人工翻译 。
In essence, this principle embodies the idea that some states have different environmental concerns and responsibilities from others. Thus, principle 7 of the Rio Declaration states.
实质上，这项原则具体是指：一些国家拥有与其他国家不同的环境问题和责任，因此，里约宣言第七项条款如下。
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The Rio Declaration contains 27 principles of sustainability.
UNESCO: Education
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