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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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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