研究是持续在更加模棱两可的影响譬如气候系统的内部可变性, 和人类影响(Ruddiman) 。 一些并且推测欧洲的那人口减少在期间 和在农业产品的收效的减退也许延长了少许冰河时期。
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William Ruddiman 科学家威廉·拉迪曼 ; 鲁迪曼
Bill Ruddiman 天气学家比尔鲁德曼
Ruddiman Argues 鲁丁曼
Dr Ruddiman argues that such an assumption is tantamount to suggesting that farmers have learned nothing in the past 5,000 years.
鲁丁曼博士还反驳到，这种假设相当于暗示在过去5000年里农民们一无所获。
youdao
In two-thousand three, American William Ruddiman first proposed that global warming resulted from human activities thousands of years ago.
VOA: special.2011.04.26
But Professor Ruddiman believes he is right, and so do the Swiss researchers.
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