Then, this past winter, there was a natural weather shift called the Arctic Oscillation, sort of a cold weather cousin to El Nino.

然后在上个冬季，出现了一种气候变化，就是所谓的“北极涛动”，和厄尔尼诺现象相关联的寒冷气候现象。

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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 theory of relaxation oscillation is described, and it give the theories analysis which is the output natural parameter of Q-switch laser.

文中阐述了调Q激光器的弛豫振荡理论，并对电光调Q激光器输出性能参数进行了理论分析。

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Anyone with even a modicum of knowledge about climate history recognizes that the Arctic experiences substantial climate swings about every 60-70 years due to entirely natural ocean oscillation cycles.

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"There is other research out there pointing out that this storage may be part of a natural cycle that will eventually reverse, either due to El Nino or the so-called Atlantic Multidecadal Oscillation, and therefore may not imply what the authors are suggesting, " he said.

BBC: Science & Environment