- an unknown quantityn.未知量，难预测的事;未知数，不知底细的人（或事物）;
- unknown error未知的错误
- unknown soldiern.阵亡的无名英雄;
- 双语例句
1、
The authorship of the poem is unknown.
这首诗的作者不详。
——《牛津高阶英汉双解词典》
2、
a hitherto unknown species of moth
迄今仍属未知种类的蛾
——《牛津高阶英汉双解词典》
3、
a species of insect previously unknown to science
科学上以前尚未了解的一种昆虫
——《牛津高阶英汉双解词典》
4、
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。
——柯林斯例句
5、
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。
——柯林斯例句
6、
My husband, for some unknown reason, suggested that I loved my birds more than him: as if I would.
我丈夫，莫名其妙地，暗示我爱鸟甚于爱他：仿佛我真如此似的。
——柯林斯例句
7、
The motive for the killing is unknown.
杀人动机不明。
——柯林斯例句
8、
An unknown number of demonstrators were arrested.
有数目不详的示威者遭到了逮捕。
——柯林斯例句
9、
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？
——柯林斯例句
10、
Owen died an unknown provincial.
欧文死的时候是一个不为人知的外乡人。
——柯林斯例句
11、
A previously unknown extremist group has said it carried out Friday's bomb attack.
一个先前不为人知的极端组织声称实施了星期五的炸弹袭击。
——柯林斯例句
12、
Once more he's making a leap into the unknown without a plan.
他再次毫无计划地乱闯。
——柯林斯例句
13、
He is an unknown quantity for his rivals.
对于对手们而言，他是个未知数。
——柯林斯例句
14、
Motherhood was for her a journey into the unknown.
做母亲当时对她来说是开始一次探险之旅.
——《简明英汉词典》
15、
Those who dared to launch out beyond the unknown waters became the discoverers of new lands.
那些敢于去人迹未至的海域航行的人成了新陆地的发现者.
——《简明英汉词典》
16、
To her the outside world was a totally unknown quantity.
对她来说,外部世界完全是个未知数.
——《简明英汉词典》
17、
She was then still comparatively unknown.
她那时候还不怎么出名.
——《简明英汉词典》
18、
Life can be likened to a journey with an unknown destination.
生活可以被比作一次不知目的的旅行.
——《简明英汉词典》
19、
An unknown man has stolen all her money.
一个陌生人把她的钱偷光了.
——《简明英汉词典》
20、
Yesterday's riot broke out at the instigation of an unknown politician.
昨日的暴乱是由一个不知名的政客煽动起来的.
——《简明英汉词典》
21、
The cause of autism is unknown.
自闭症的病因尚不清楚.
——《简明英汉词典》
22、
A generation ago genetic codes were certainly unknown.
遗传密码在上一代确实很少有人知道.
——《简明英汉词典》
23、
Matter is an unknown somewhat.
物质是某种不明的东西.
——《现代英汉综合大词典》
24、
The outcome of their discussion is still unknown.
他们讨论的结果仍然不清楚.
——《现代英汉综合大词典》
25、
The address is unknown to me.
地址未详.
——《现代汉英综合大词典》
26、
His present whereabouts is unknown.
他去处不明.
——《现代汉英综合大词典》
27、
Those explorers gallantly adventureed on unknown seas.
那些探险家们大胆地在陌生的海域探险.
——《现代英汉综合大词典》
28、
This truck is of unknown origin.
这辆卡车来历不明.
——《现代汉英综合大词典》
29、
The details of the case is unknown.
案情未详.
——《现代汉英综合大词典》
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