未知的

• uncharted
• unheard
• unknown
• undiscovered
• unbeknown
• sealed
• unsuspected

例句

1. 文字代表一特定常量或数字的可知或未知的字母或符号，非编程者所规定
   A letter or symbol that represents a particular constant or number, known or unknown, and is not programmer-defined.
2. 它的大部分对我是未知的。
   Its greater part is unknown to me.
3. 这时，居里夫人的丈夫皮埃尔·居里也和她一起寻找这未知的放射性物质。
   At this time Madame Curie's husband Pierre Curie joined with her in search of the unknown radiation.