厄尔尼诺是赤道附近的太平洋周期性变暖现象，引发风暴和其它气候事件，历史上每三至七年发生一次，持续时间可长达两年。
El Ni? O, the periodic warming of the equatorial Pacific that induces storms and other climatic events, historically occurs once every three to seven years and lasts for up to two years.
厄尔尼诺是赤道附近的太平洋周期性变暖现象，引发风暴和其它气候事件，历史上每三至七年发生一次，持续时间可长达两年。
El Ni? O, the periodic warming of the equatorial Pacific that induces storms and other climatic events, historically occurs once every three to seven years and lasts for up to two years.
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