短語(yǔ)詞組短語(yǔ)Unknown phone number 未知的電話號(hào)碼;未知unknown prime number [數(shù)]未知素?cái)?shù)unknown rational number 未確知有理數(shù)an unknown number detail 一個(gè)未知數(shù)exchanging unknown number 換元coord mate unknown number 坐標(biāo)未知數(shù)coordinate angle unknown number 坐標(biāo)角未知數(shù)unknown number of sources 未知源信號(hào)個(gè)數(shù)From A Unknown Number 從一個(gè)未知數(shù) 返回 unknown number