We observed a clear periodicity in the number of whales stranded each year that coincides with a major climatic cycle.

我们观察到每年搁浅的鲸鱼数量有明显的周期性，这与一个主要的气候周期相吻合。

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No one disputes that temperatures have been rising, but some say that is just part of a climatic cycle that earth has been undergoing for eons.

CNN: NATURE'S WRATH

Climatic changes of the 20th century have altered the water cycle in the Andean basins of central Argentina.

UNESCO: Dublin Core