劍橋詞典a person or a thing whose abilities , powers , or effects are not yet known 未知數(shù)（尚未被人了解的人或事物） The third candidate for the seat is a relatively unknown quantity . 競選黨領(lǐng)導(dǎo)的第三個候選人的具體情況相對而言還不甚清楚。 返回 unknown quantity