unknown

未知的；陌生的，默默无闻的英释中释adjnot known about

未知数；未知的事物，默默无闻的人英释中释nthings that you do not know or understand

1 unknown number,未知数

2 unknown soldier,（美）阵亡的无名英雄

3 fever of unknown origin,无明显病因的发烧

1 The murderer’s identity remains unknown..杀人凶手身份仍然不明。

2 For some unknown reason, Mark quit his job and moved to Greece..不知何故，马克辞掉工作移居希腊了。

3 a voyage through unknown territory.穿越未知海域的航行

4 An unknown number of people were killed..丧生人数不详。