Occurrence in thesaurus or index associated with the information collection
在与信息集合关联的词典或索引中的出现频率
Returns the index of the first occurrence of a given value in a range of this collection.
返回在此集合范围内给定值的第一个匹配项的索引。
Analysis of Meteorological Index of Wheat Scab Occurrence and its Application in Forecasting
小麦赤霉病流行的气象指标分析及在测报上的应用
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