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拜登为何在气候问题上“格外”积极？美国想得到什么？
大国再通话！美国希望我们在气候问题上相互合作，合作什么？美国气候特使已经来访2次，紧接着还要去印度，美国为何对气候问题如此上心？我们应如何应对气候合作？
财经要闻解读45/404
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