Days were filled with swimming in frigidly cold high mountain lakes and streams and lazy rides on the horses.

在那些日子里，我要么整日在刺骨般寒冷的高山湖与溪流中游泳，要么就懒懒地骑马四处游荡。

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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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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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These large warm and cold, high and low sea levels are slow-developing and long-lasting, and will certainly influence global climate and weather for the coming summer and into next fall.

CNN: Western U.S. to get smoggy summer, fall

Under freezing winter conditions the output can be miniscule because very cold weather and high winds require turbines to be shut down to avoid damage.

FORBES: Lessons From Lemmings: The EU's Green Power Folly

Having worked hard as a team, made new friends and completed a task in the open air, despite the cold, figured high on the list of positives.

BBC: Education & Family