adj.未知的；不出名的；从未发生的；从不存在的n.不知名或不出名的人；未知的事物；未知数；未知数 变形： 复数：unknowns 英英释义： unknown[ 'ʌn'nəun ]n.an unknown and unexplored region"they came like angels out the unknown"同义词：unknown regionterra incognitaanyone who does not belong in the environment in which the