短語詞組短語Unknown phone number 未知的電話號碼;未知unknown prime number [數(shù)]未知素數(shù)unknown rational number 未確知有理數(shù)an unknown number detail 一個未知數(shù)exchanging unknown number 換元coord mate unknown number 坐標未知數(shù)coordinate angle unknown number 坐標角未知數(shù)unknown number of sources 未知源信號個數(shù)From A Unknown Number 從一個未知數(shù) 返回 unknown number