Based on the grey theory, the principle and processes of grey undee forecast were introduced.Combined with the fact of Shangcheng County, the annual rainfall undee forecast model was built.是什么意思_Based on the grey theory, the principle and processes of grey undee forecast were introduced.Combined with the fact of Shangcheng County, the annual rainfall undee forecast model was built.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句