- unknown
 - adj. 未知的;陌生的,默默无闻的
n. [数]未知数;未知的事物,默默无闻的人 
同义词
           
       反义词
           - a. known
 
参考例子
           - 1.Unknown so the sigh.
 - 不明所以的叹气。
 
- 2.Unknown to Death.
 - 未知的死亡。
 
- 3.A new day is unknown, you ready to discover it?
 - 新的一天是未知的,准备好去发现它了么?
 
英文解释
           - n.
 - 1.an unknown and unexplored region
 - 2.anyone who does not belong in the environment in which they are found
 - 3.a variable whose values are solutions of an equation
 
- adj.
 - 1.not known
 - 2.being or having an unknown or unnamed source
 - 3.not known to exist
 - 4.not famous or acclaimed
 - 5.not known before
 
网络释义
               - UNKNOWN
 - 不能确定; 未知数; 未知的; 未知量;
 
- Contents Unknown
 - 内容不详; 内容不明; 内货不详; 内容不知,内货不详;
 
- UNK unknown
 - 未知的;
 
- unknown word
 - 未知词 [未定义词; 未知词;
 
- content unknown
 - 内货不详; 内容不明; 货物内容不详;