The observational data show that the extreme relative humidity is 91% when fog occurred, there is no fog when the relative humidity is lower than 90%.是什么意思_The observational data show that the extreme relative humidity is 91% when fog occurred, there is no fog when the relative humidity is lower than 90%.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句