Recent studies do in fact show that high carbon dioxide levels are associated with warm interglacial periods, and low levels with cold glacial periods.

最近的研究确实表明，高二氧化碳水平与温暖的间冰期有关，而低二氧化碳水平与寒冷的冰期有关。

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High carbon dioxide levels are associated with warm interglacial periods, and low levels with cold glacial periods.

高二氧化碳含量与温暖的间冰期有关，低二氧化碳含量与寒冷的冰期有关。

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The results showed that the climate changing patterns had gone through several complex cycles of "warm and dry" and "cold and moist" periods.

结果表明，全新世以来，中国西部干旱区的气候变化经历了多次的相对暖干和相对冷湿交替变化，变化历程较为复杂。

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Comparisons with other sites show that Homo erectus survived successive warm and cold periods in northern Asia.

BBC: 'Peking Man' older than thought

They tell of repeated alternations between warm periods when the pass was useable and cold periods when it was shut by the ice.

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There is clear evidence that winter storms throughout southern Scandinavia were more frequent and intense during the multi-century Dark Ages Cold Period and the much more recent Little Ice Age than either now or other comparably warm periods.

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