ONF) being 1 when the event occurrence is observed but not forecast; 0 otherwise. The summation is over all grid points or stations.是什么意思_ONF) being 1 when the event occurrence is observed but not forecast; 0 otherwise. The summation is over all grid points or stations.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句