我们在筏子上对这些反常天气见得太多了。

On our raft we have witnessed this aberration only too well.

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然而拉尼娜现象只是一自然周期现象，并不是最近反常天气的唯一成因。

But la Nina, which is natural and cyclical, is not the only driver behind weird weather reports lately.

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但中国近期的极端天气状况，还不是唯一被归因于拉尼娜现象的反常天气。

But the recent extreme weather in China is not alone in being attributed to La Nina.

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