precipitation anomaly的用法和樣例：
例句
- The onsetpentad index and the drop-pentad index are independent with each other, which is favorable to the prediction of the anomalies of the circulation and precipitation of EASM.
江南春雨的建立時(shí)間和南海副高減弱時(shí)間之間又具有線(xiàn)性無(wú)關(guān)性，可以為東亞夏季風(fēng)環(huán)流和降水異常的預報提供重要線(xiàn)索。
