unknown

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

复数：unknowns

unknown number未知数

unknown soldier（美）阵亡的无名英雄

fever of unknown origin无明显病因的发烧

1. I braced myself for the unknown.
   我准备好了去接受未知的命运。
2. Its greater part is unknown to me.
   它的大部分对我是未知的。
3. He was an unknown novelist then.
   当时他是位不出名的小说家。
4. No one could match the skill of the unknown carver.
   没有哪个人的技艺能比得上那位不出名的雕刻家。

Energy detection of unknown deterministic signals
The Ki-67 protein: From the known and unknown
Teleporting an unknown quantum state via dual classical and EPR channels
On the Energy Detection of Unknown Signals Over Fading Channels
On the energy detection of unknown signals over fading channels
On the Kolmogorov-Smirnov Test for Normality with Mean and Variance Unknown
Testing for unit roots in autoregressive-moving average models of unknown order
Automatic processing of rotation diffraction data from crystals of initially unknown symmetry and cell constants
FastSLAM: An Efficient Solution to the Simultaneous Localization And Mapping Problem with Unknown Data
"Tests for parameter instability and structural change with unknown change point'' [Econometrics 61 (1993), no. 4, 821–826; MR12316...