unknown.的例句（unknown.在句子中的用法）

• The cause of autism is unknown. 自闭症的病因尚不清楚.
• The authorship of the poem is unknown. 这首诗的作者不详。
• Direct alkoxylation of aromatic compounds is virtually unknown. 事实上还不知道芳香族化合物的直接烷氧基化的方法.
• In algebra, the sign X usually denotes an unknown quantity. 在代数里, 符号X常用来表示未知数.
• Owen died an unknown provincial. 欧文死的时候是一个不为人知的外乡人。
• The contract was awarded to a previously unknown company... 合同签给了一个之前并不知名的公司。
• Ignorance of people brings fear, fear of the unknown. 人们的无知会带来恐惧，对未知事物的恐惧。
• A hundred years ago coronary heart disease was virtually unknown in Europe and America. 在100年前冠心病几乎不存在于欧洲和美洲。
• ...a popular environment where both established and unknown artists can meet, talk and drink. 成名和未成名的艺术家都可以聚会、聊天及喝酒的一处热门场所
• He was an unknown writer. 他是个名不见经传的作家。
• I could not understand how someone with so many awards could be unknown to me. 我想不通自己竟然不认识获了这么多奖的人。
• Unknown thieves had forced their way into the apartment... 不知名的窃贼破门闯入了公寓。
• How did you expect us to proceed on such a perilous expedition, through unknown terrain... 你怎么能指望我们如此冒险地穿越未知的地域，继续这一探险？
• An unknown number of demonstrators were arrested... 有数目不详的示威者遭到了逮捕。
• He is an unknown quantity for his rivals. 对于对手们而言，他是个未知数。
• The timing of the attack, and its motivations, are unknown. 袭击发生的时间及其动机尚不清楚。
• Unknown attackers riddled two homes with gunfire... 来路不明的袭击者用枪炮将两处住宅打得千疮百孔。
• ...the stunning fashion pictures which launched unknown teenager Jane March on the road to stardom. 让名不见经传的少女简·马奇走向成名之路的惊艳的时装照片
• The condition is practically unknown outside psychiatry clinics. 除了医院的精神病科外，这种病几乎不为人知。
• Once more he's making a leap into the unknown without a plan. 他再次毫无计划地乱闯。