这个词是什么意思？
Events that have extreme values of important meteorological variables. Extreme is generally defined as either taking maximum values or exceedance above pre-existing high thresholds. Such events are generally rare; for example, extreme wind speeds exceeding the 100-year return value, which have a probability of only 0.01 of occurring in any particular year. (Stephenson, 2008)
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D000080165 · MeSH 2026。
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