China-US interactions and enduring stability and prosperity in the Asia-Pacific region form a virtuous cycle.

中美互动与亚太地区持续稳定繁荣形成良性循环。

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La Nina is a natural 3-6-year cycle, and the cold stretch of a periodic thermal oscillation in ocean surface temperatures that occurs throughout the tropical Pacific.

拉尼娜每隔3到6年发生一次，太平洋热带地区海水温度会随之发生周期性的异常变冷。

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The results from this model study indicate that the essential dynamics of the ENSO cycle can be determined by the tropical Pacific coupled ocean-atmosphere system itself.

本文数值模拟结果表明，ENSO循环的主要动力学过程可由热带海气相互作用系统自身所确定。

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The best hope lies in trying to identify the broader changes under way - for example with the retreat of the Arctic sea-ice or the cycle of warming in the Pacific Ocean with El Nino and La Nina.

BBC: Predicting the next big flood

It could change the frequency of the Pacific pattern known as El Nino, a cycle of peculiar weather that affects ocean currents and rainfall across the planet.

NPR: Pacific Island Cultures Brace for Climate Change

All parts of the country, especially the Midwest, Pacific Northwest and the South, are likely to produce some of the most interesting races this cycle.

CNN: What's at Stake: Overview